Function setup_ctrl_socket

src/socket.cpp:482–540

}

void setup_ctrl_socket()
{
    int port, firstport;
    int try_counter = 60;
    struct sockaddr_storage ctl_sa;

    int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (sock == -1) {
        ERROR_NO("Unable to create remote control socket!");
    }

    if (control_port) {
        port = control_port;
        /* If the user specified the control port, then we must assume they know
         * what they want, and should not cycle. */
        try_counter = 1;
    } else {
        /* Allow 60 control sockets on the same system */
        /* (several SIPp instances)                   */
        port = DEFAULT_CTRL_SOCKET_PORT;
    }
    firstport = port;

    memset(&ctl_sa, 0, sizeof(struct sockaddr_storage));
    if (control_ip[0]) {
        if (gai_getsockaddr(&ctl_sa, control_ip, nullptr,
                            AI_PASSIVE, AF_UNSPEC) != 0) {
            ERROR("Unknown control address '%s'.\n"
                  "Use 'sipp -h' for details", control_ip);
        }
    } else {
        ((struct sockaddr_in *)&ctl_sa)->sin_family = AF_INET;
        ((struct sockaddr_in *)&ctl_sa)->sin_addr.s_addr = INADDR_ANY;
    }

    while (try_counter) {
        ((struct sockaddr_in *)&ctl_sa)->sin_port = htons(port);
        if (!::bind(sock, (struct sockaddr *)&ctl_sa, sizeof(struct sockaddr_in))) {
            /* Bind successful */
            break;
        }
        try_counter--;
        port++;
    }

    if (try_counter == 0) {
        if (control_port) {
            ERROR_NO("Unable to bind remote control socket to UDP port %d",
                     control_port);
        } else {
            WARNING("Unable to bind remote control socket (tried UDP ports %d-%d): %s",
                    firstport, port - 1, strerror(errno));
        }
        close(sock);
        return;
    }

    ctrl_socket = new SIPpSocket(0, T_UDP, sock, 0);