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/*
* Dibbler - a portable DHCPv6
*
* authors: Tomasz Mrugalski <thomson@klub.com.pl>
* Marek Senderski <msend@o2.pl>
*
* released under GNU GPL v2 licence
*
*/
#include "DHCPConst.h"
#include "OptUserClass.h"
#include "Portable.h"
#include <string.h>
TOptUserClass::TOptUserClass(uint16_t type, const char* buf, unsigned short buf_len, TMsg* parent)
:TOpt(type, parent) {
Valid = parseUserData(buf, buf_len);
}
TOptUserClass::TOptUserClass(uint16_t type, TMsg* parent)
:TOpt(type, parent) {
Valid = true;
}
size_t TOptUserClass::getSize() {
size_t len = 4;
for (std::vector<UserClassData>::const_iterator data = userClassData_.begin();
data != userClassData_.end(); ++data) {
len += 2; // len field
len += data->opaqueData_.size();
}
return len;
}
char * TOptUserClass::storeSelf(char* buf) {
buf = writeUint16(buf, OptType);
buf = writeUint16(buf, getSize() - 4);
return storeUserData(buf);
}
char * TOptUserClass::storeUserData(char* buf) {
for (std::vector<UserClassData>::const_iterator data = userClassData_.begin();
data != userClassData_.end(); ++data) {
buf = writeUint16(buf, data->opaqueData_.size());
memcpy(buf, &data->opaqueData_[0], data->opaqueData_.size());
buf += data->opaqueData_.size();
}
return buf;
}
/// @brief parses UserData field
///
/// @return true if parsing was successful, false otherwise
bool TOptUserClass::parseUserData(const char* buf, unsigned short buf_len) {
int pos = 0;
while (buf_len > 2) {
uint16_t len = readUint16(buf + pos);
buf_len -= sizeof(uint16_t);
pos += sizeof(uint16_t);
if (len > buf_len) {
// truncated user-data
return false;
}
UserClassData data;
data.opaqueData_.resize(len);
memcpy(&data.opaqueData_[0], buf + pos, len);
userClassData_.push_back(data);
pos += len;
buf_len -= len;
}
if (buf_len) {
return false;
}
return true;
}
bool TOptUserClass::isValid() const {
return true;
}
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