void NetworkPacket::checkReadOffset(u32 from_offset, u32 field_size)
{
if (from_offset + field_size > m_datasize) {
std::stringstream ss;
ss << "Reading outside packet (offset: " <<
from_offset << ", packet size: " << getSize() << ")";
throw PacketError(ss.str());
}
}
InetPacket::InetPacket(shared_ptr<Packet> packet, Protocol datalink_protocol) :
Packet(packet->getLength(), packet->getTimestamp(), packet->raw_data_begin(),
packet->raw_data_length()) {
if (!isValid(packet, datalink_protocol)) {
throw PacketError("inet");
}
this->datalinkInfo = shared_ptr<DatalinkInfo>(new EthernetInfo(this->raw_data_begin()));
this->datalink_header = this->start;
this->datalink_data = this->start + this->datalinkInfo->getLength();
}
string InPacket::readpadascii(int16_t count)
{
if (count > top - pos)
throw PacketError("Stack underflow while reading string.");
string ret;
for (int16_t i = 0; i < count; i++)
{
char letter = bytes[pos];
if (letter != '\0')
{
ret.push_back(letter);
}
pos++;
}
return ret;
}
void InPacket::skip(size_t count)
{
if (count > top - pos)
throw PacketError("Stack underflow while using skip.");
pos += count;
}
