how does DC++ to get isp Internet IP in active mode ?

dahwoud · Post by **dahwoud** » 2004-04-13 09:26

Thanks

Post by **GargoyleMT** » 2004-04-13 20:05

It doesn't get it from outside the network, it pulls trom the local network interfaces:

string Client::getLocalIp() const { 
	if(!SETTING(SERVER).empty()) {
		return Socket::resolve(SETTING(SERVER));
	}
	if(getMe() && !getMe()->getIp().empty())
		return getMe()->getIp();

	if(socket == NULL)
		return Util::getLocalIp();
	string tmp = socket->getLocalIp();
	if(tmp.empty())
		return Util::getLocalIp();
	return tmp;
}

Code: Select all

string Util::getLocalIp() {
	string tmp;
	
	char buf[256];
	gethostname(buf, 255);
	hostent* he = gethostbyname(buf);
	if(he == NULL || he->h_addr_list[0] == 0)
		return Util::emptyString;
	sockaddr_in dest;
	int i = 0;
	
	// We take the first ip as default, but if we can find a better one, use it instead...
	memcpy(&(dest.sin_addr), he->h_addr_list[i++], he->h_length);
	tmp = inet_ntoa(dest.sin_addr);
	if( strncmp(tmp.c_str(), "192", 3) == 0 || 
		strncmp(tmp.c_str(), "169", 3) == 0 || 
		strncmp(tmp.c_str(), "127", 3) == 0 || 
		strncmp(tmp.c_str(), "10.", 3) == 0 ) {
		
		while(he->h_addr_list[i]) {
			memcpy(&(dest.sin_addr), he->h_addr_list[i], he->h_length);
			string tmp2 = inet_ntoa(dest.sin_addr);
			if(	strncmp(tmp2.c_str(), "192", 3) != 0 &&
				strncmp(tmp2.c_str(), "169", 3) != 0 &&
				strncmp(tmp2.c_str(), "127", 3) != 0 &&
				strncmp(tmp2.c_str(), "10.", 3) != 0) {
				
				tmp = tmp2;
			}
			i++;
		}
	}
	return tmp;
}

dahwoud · Post by **dahwoud** » 2004-04-18 04:21

Qbert · Post by **Qbert** » 2004-04-18 15:43

You can still manually set it in the connection settings. Why the sad face?

gbickford · Post by **gbickford** » 2004-06-05 04:10

perhaps they don't have an OC3 or a static ip address and they don't want to have to manually set their external ip address every time they open dc++.

at least thats why i'm here.

Post by **GargoyleMT** » 2004-06-05 08:03

gbickford wrote:perhaps they don't have an OC3 or a static ip address and they don't want to have to manually set their external ip address every time they open dc++.

One such existing option is to use a dynamic DNS name instead of an IP address.

PseudonympH · Post by **PseudonympH** » 2004-06-05 21:21

Unfortunately, that won't be an option under ADC, and I think that's something that will make a fair amount of people angry about it. That and the UTF-8 thing are the only things the average end user could possibly notice, and it's sad that one of them is a big negative, and the other will not be noticed by many.

Sedulus · Post by **Sedulus** » 2004-06-06 06:03

hm?

1) DC++ resolves the hostname before sending it out --> ADC clients can still do that. at no point does the hub see a hostname.
2) ADC clients don't need to. by sending the null IP (0.0.0.0) you do a request for your own IP as the hub sees it.

gbickford · Post by **gbickford** » 2004-06-06 08:39

So I can just throw a hostname, 0.0.0.0, or nothing at all in there and I will still be in active mode?

g

Post by **GargoyleMT** » 2004-06-06 09:35

gbickford wrote:So I can just throw a hostname, 0.0.0.0, or nothing at all in there and I will still be in active mode?

0.0.0.0 (for non-existent ADC hubs): yes.
hostname: yes.

You only need for force the IP when your local machine's IP is different from your external IP (and you have control over port forwarding at the router).

PseudonympH · Post by **PseudonympH** » 2004-06-07 14:57

Sedulus wrote:1) DC++ resolves the hostname before sending it out

Ah... I didn't know that was how it worked.