Method get_local_ip_addr

src/utils/socket_client_udp.cpp:15–91

int SocketClientUDP::get_local_ip_addr (const char *connect_ip, int port, char *local_ip)
{
    WSADATA wsadata;
    int return_value = (int)SocketClientUDPReturnCodes::STATUS_OK;
    struct sockaddr_in serv;
    char buffer[80];
    SOCKET sock = INVALID_SOCKET;
    struct sockaddr_in name;
    bool wsa_initialized = false;
    int res = WSAStartup (MAKEWORD (2, 2), &wsadata);
    if (res != 0)
    {
        return_value = (int)SocketClientUDPReturnCodes::WSA_STARTUP_ERROR;
    }
    else
    {
        wsa_initialized = true;
    }

    if (return_value == (int)SocketClientUDPReturnCodes::STATUS_OK)
    {
        sock = socket (AF_INET, SOCK_DGRAM, 0);
        if (sock == INVALID_SOCKET)
        {
            return_value = (int)SocketClientUDPReturnCodes::CREATE_SOCKET_ERROR;
        }
    }

    if (return_value == (int)SocketClientUDPReturnCodes::STATUS_OK)
    {
        memset (&serv, 0, sizeof (serv));
        serv.sin_family = AF_INET;
        if (inet_pton (AF_INET, connect_ip, &serv.sin_addr) == 0)
        {
            return_value = (int)SocketClientUDPReturnCodes::PTON_ERROR;
        }
        serv.sin_port = htons (port);
    }

    if (return_value == (int)SocketClientUDPReturnCodes::STATUS_OK)
    {
        if (::connect (sock, (const struct sockaddr *)&serv, sizeof (serv)) == SOCKET_ERROR)
        {
            return_value = (int)SocketClientUDPReturnCodes::CONNECT_ERROR;
        }
    }

    if (return_value == (int)SocketClientUDPReturnCodes::STATUS_OK)
    {
        int name_len = sizeof (name);
        int err = getsockname (sock, (struct sockaddr *)&name, &name_len);
        if (err != 0)
        {
            return_value = (int)SocketClientUDPReturnCodes::CONNECT_ERROR;
        }
    }

    if (return_value == (int)SocketClientUDPReturnCodes::STATUS_OK)