netgraph TTY

From: Jerry Toung (jtoung_at_arc.nasa.gov)
Date: 03/31/05

  • Next message: Maksim Yevmenkin: "Re: netgraph TTY" 
    To: hackers <freebsd-hackers@freebsd.org>
Date: Wed, 30 Mar 2005 16:20:24 -0800

    Good afternoon list,
    I am still trying to build a simple netgraph using ng_tty. Ultimately I would
    like to go from inet->tee->ng_tty(/dev/cuaa0).

    Please advise what I am doing wrong as I still see an error message (see
    bottom of email). Excuse me for the slighty long thread.

    Here is my very simple line discipline code:

            int d;
            int ldisc;
            ldisc = NETGRAPHDISC;

            
            if ((d = open("/dev/cuaa0", O_RDWR)) == -1) {
                    perror("open");
            } else {
                printf("descripto # %d\n", d);
                if ((ioctl(d, TIOCSETD, &ldisc)) == -1) {
                    perror("ioctl");
                }
            }
            printf("Netgraph TTY node initialized successfully\nPress any key to
    destroy it");
            getc(stdin);
            close(d);
            exit;

    mrcrab# gcc -g netgraph.c -o test
    mrcrab# ./test
    descripto # 3
    Netgraph TTY node initialized successfully
    Press any key to destroy it

    + list
    There are 2 total nodes:
      Name: ngctl27022 Type: socket ID: 0000000a Num hooks: 0
      Name: tty1 Type: tty ID: 00000008 Num hooks: 0
    + mpeer . tee myhook right
    ngctl: "mpeer": unknown command
    + mkpeer . tee myhook right
    + name .:myhook mytee
    + mkpeer mytee: tty left hook
    ngctl: send msg: Operation not permitted
    +

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  • Next message: Maksim Yevmenkin: "Re: netgraph TTY"