IPV6 Connect error 10049(A-GAIN!) - sockets

Question

So I configured windows 8 firewall to allow IPV6 outbound and inbound connections as a precautionary measure but whenever I try to connect to either are remote host or to my own machine using the loopback address(to an ipv6 server application running simultaneously)the connect function FAILS with error 10049 regardless of what port I choose. Is this a network configuration problem? IP4 works just fine.
#include "stdafx.h"
#include <iostream>
#include <iostream>
#include <string>
#include <stdlib.h>
#ifndef UNICODE
#define UNICODE
#endif
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <WS2tcpip.h>
#include <ws2ipdef.h>
#include <iphlpapi.h>
#include <IPTypes.h>
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib,"iphlpapi.lib")
using namespace std;
static int MAXPENDING = 5;
void set_interface(SOCKET s, DWORD Index);
int main(int argc,char* argv[])
{
WSADATA wsaData;
int Result;
int optv = 1;
char *optval = (char*)&optv;
int optlen = sizeof(optval);
DWORD Index = 22;
bool connected = false;
string exit = "quit";
string name;
sockaddr_in6 c_addr;
c_addr.sin6_family = AF_INET6;
char buffer[1024];
Result = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (Result != NO_ERROR) {
printf("WSAStartup function failed with error: %d\n", GetLastError());
return 0;
}
SETUP:
SOCKET connector;
connector = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
if (connector == INVALID_SOCKET) {
wprintf(L"socket function failed with error: %ld\n", WSAGetLastError());
closesocket(connector);
return 1;
}
cout << "Enter host name(URL): ";
cin >> name;
cout << endl;
char *hostname = const_cast<char*>(name.c_str());
if(inet_pton(AF_INET6,hostname,&c_addr.sin6_addr)<0){
printf("InetPton() function failed with error: %d/n",GetLastError());
closesocket(connector);
return 1;
}
string p;
char *hostport;
int p0rt;
cout << "Enter the port number you wish to connect on: " ;
cin >> p;
cout << endl;
hostport = const_cast<char*>(p.c_str());
p0rt = atoi(hostport);
if(!( 0 < p0rt && p0rt < 65,536)){
cout << "Error: port number must be greater than 0 and less than 65,536. " << endl;
cout << endl;
cout << "Re-enter the port number you wish to connect on: " ;
cin >> p;
cout << endl;
hostport = const_cast<char*>(p.c_str());
p0rt = atoi(hostport);
}else{
c_addr.sin6_port = htons(p0rt);
}
if(connect(connector,(sockaddr*)&c_addr,sizeof(c_addr))<0){
printf("Connect failed with error: %d\n",GetLastError());
string cmd;
cout << endl;
cout <<"Try again? Type 'y' to reattempt connection or type any other key to exit: ";
cin >> cmd;
cout << endl;
if(cmd=="y"){
goto SETUP;
}else {
goto QUIT;
}
}else{
connected = true;
cout << "Connected to host " << hostname << " on port " << c_addr.sin6_port << endl;
cout << "Type 'quit' to exit the program " << endl;
}
while(connected==true){
int nbr = 0;
cout << endl;
cout << ">";
scanf("%s",buffer);
cout << endl;
string str(buffer);
if(str==exit){
connected = false;
goto QUIT;
}
long nbs = send(connector,buffer,sizeof(buffer),0);
if(nbs < 0){
printf("send() failed", GetLastError());
goto QUIT;
}
while(nbr < nbs){
nbr = recv(connector,buffer,sizeof(buffer),0);
if(nbr < 0){
printf("recv() failed", GetLastError());
goto QUIT;
}else if(nbr==0){
printf("recv() failed: connection closed prematurely", GetLastError());
goto QUIT;
}else if(nbr > 0){
cout << endl;
cout << ">> ";
printf(buffer);
cout << endl;
}
}
}
QUIT:
if (closesocket(connector) == SOCKET_ERROR) {
printf("closesocket function failed with error: %ld\n", GetLastError());
WSACleanup();
return 1;
}
WSACleanup();
return 0;
};
void set_interface(SOCKET s, DWORD Index){
MIB_IF_ROW2 T2;
NET_LUID ID;
DWORD ptbuflen = (DWORD)sizeof(T2);
ConvertInterfaceIndexToLuid(Index,&ID);
T2.InterfaceLuid = ID;
GetIfEntry2(&T2);
if(WSAIoctl(s,SIO_ASSOCIATE_HANDLE,&T2,ptbuflen,NULL,0,0,NULL,NULL)>0){
printf("WSAIoctl() function failed with error: %d\n", GetLastError());
closesocket(s);
}
if(WSAIoctl(s,SIO_TRANSLATE_HANDLE,&T2,ptbuflen,NULL,0,0,NULL,NULL)>0){
printf("WSAIoctl() function failed with error: %d\n", GetLastError());
closesocket(s);
}
};

Answer 1

You need to zero out the portion of the sockaddr_in6 that you are not using. Zero out the enire thing first, then fill in the portions you need.
If the user fails to enter a valid port the first time, you are not validating the new port entered the second time, and you are not assigning that second port value to the sockaddr_in6 at all. You should be doing your validation in a loop, and then assign the final accepted value to the sockaddr_in6.
You are using inet_pton() when you should be using getaddrinfo() instead. inet_pton() only converts an IP address string to its binary format. It will not resolve a hostname to an IP. getaddrinfo() does that resolution instead, and it also supports converting IP address strings as well (specify the AI_NUMERICHOST flag in the hints parameter to get that behavior).