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Fixed issue #29: Added empty name check on DNS::encode_domain_name.

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This commit is contained in:
Matias Fontanini
2014-08-20 22:44:03 -03:00
parent 2d6fcfb74a
commit d2f0cd0686
1 changed files with 8 additions and 6 deletions
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14
src/dns.cpp
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@@ -295,13 +295,15 @@ void DNS::add_additional(const Resource &resource){
std::string DNS::encode_domain_name(const std::string &dn) {
std::string output;
size_t last_index(0), index;
while((index = dn.find('.', last_index+1)) != string::npos) {
output.push_back(index - last_index);
output.append(dn.begin() + last_index, dn.begin() + index);
last_index = index + 1; //skip dot
if(!dn.empty()) {
while((index = dn.find('.', last_index+1)) != string::npos) {
output.push_back(index - last_index);
output.append(dn.begin() + last_index, dn.begin() + index);
last_index = index + 1; //skip dot
}
output.push_back(dn.size() - last_index);
output.append(dn.begin() + last_index, dn.end());
}
output.push_back(dn.size() - last_index);
output.append(dn.begin() + last_index, dn.end());
output.push_back('\0');
return output;
}