ADD_TEST(DNSTest, HostByName) {
Exception ex;
HostEntry hostEntry;
DNS::HostByName(ex, "aliastest.appinf.com", hostEntry);
CHECK(!ex)
// different systems report different canonical names, unfortunately.
CHECK(hostEntry.name() == "dnstest.appinf.com" || hostEntry.name() == "aliastest.appinf.com");
CHECK(hostEntry.addresses().size() >= 1);
CHECK(hostEntry.addresses().front().toString() == "1.2.3.4");
DNS::HostByName(ex, "nohost.appinf.com", hostEntry);
CHECK(ex); // must not to find the host
}
bool SocketAddress::setIntern(Exception& ex,const string& host, UInt16 port,bool resolveHost) {
IPAddress ip;
Exception ignore;
if (ip.set(ignore, host)) {
set(ip, port);
return true;
}
HostEntry entry;
if (!resolveHost) {
if (ignore)
ex.set(ignore);
return false;
}
if (!DNS::HostByName(ex, host, entry))
return false;
auto& addresses = entry.addresses();
if (addresses.size() > 0) {
// if we get both IPv4 and IPv6 addresses, prefer IPv4
for (const IPAddress& address : addresses) {
if (address.family() == IPAddress::IPv4) {
set(address, port);
return true;
}
}
set(addresses.front(), port);
return true;
}
ex.set(Exception::NETADDRESS, "No address found for the host ", host);
return false;
}
ADD_TEST(DNSTest, HostByAddress) {
Exception ex;
HostEntry hostEntry;
IPAddress ip;
ip.set(ex, "80.122.195.86");
CHECK(!ex)
DNS::HostByAddress(ex, ip, hostEntry);
CHECK(!ex)
CHECK(hostEntry.name() == "mailhost.appinf.com");
CHECK(hostEntry.aliases().empty());
CHECK(hostEntry.addresses().size() >= 1);
CHECK(hostEntry.addresses().front().toString() == "80.122.195.86");
ip.set(ex, "10.0.244.253");
CHECK(!ex)
DNS::HostByAddress(ex, ip, hostEntry);
CHECK(ex)
}
void SocketAddress::init(const std::string& host, Poco::UInt16 port)
{
IPAddress ip;
if (IPAddress::tryParse(host, ip))
{
init(ip, port);
}
else
{
HostEntry he = DNS::hostByName(host);
HostEntry::AddressList addresses = he.addresses();
if (addresses.size() > 0)
{
#if defined(POCO_HAVE_IPv6)
// if we get both IPv4 and IPv6 addresses, prefer IPv4
std::sort(addresses.begin(), addresses.end(), AFLT());
#endif
init(addresses[0], port);
}
else throw HostNotFoundException("No address found for host", host);
}
}
