[openbeosnetteam] Select code...

This is the code I'm using and it doesn't work!


in net_structures.h

struct select_args {
        int mfd;
        struct fd_set *rbits;
        struct fd_set *wbits;
        struct fd_set *ebits;
        struct timeval *tv;
};

In libnet.c we take this and make the call to ioctl...

int net_select(int nbits, struct fd_set *rbits,
                      struct fd_set *wbits,
                      struct fd_set *ebits,
                      struct timeval *timeout)
{
        int tmpfd = open("/dev/net/socket", O_RDWR);
        struct select_args sa;
        int error;
        int i;

        sa.mfd = nbits;
        sa.rbits = rbits;
        sa.wbits = wbits;
        sa.ebits = ebits;
        sa.tv = timeout;

        for (i=2; i <10;i++) {
                if (rbits)
                        if (FD_ISSET(i, rbits))
                                printf("socket %d set in read bits...\n",
i);
        }

        error = ioctl(tmpfd, NET_SOCKET_SELECT, &sa, sizeof(sa));
        close(tmpfd);
        return error;
}

In the socket driver we call this code...

                case NET_SOCKET_SELECT: {
                        struct select_args *sa = (struct select_args *)data;
                        int i;
                dprintf("NET_SOCKET_SELECT, mfd = %d\n", sa->mfd);
                        for (i=2; i < sa->mfd;i++) {
                                dprintf("socket %d: ", i);
                                if (sa->rbits && FD_ISSET(i, sa->rbits))
                                        dprintf(" read bit ", i);
                                if (sa->wbits && FD_ISSET(i, sa->wbits))
                                        dprintf(" write bit ", i);
                                if (sa->ebits && FD_ISSET(i, sa->ebits))
                                        dprintf(" except bit ", i);

                                dprintf("\n");
                        }

                        i = select(sa->mfd, sa->rbits, sa->wbits, sa->ebits,
sa->tv);
                        dprintf("kernel select returned %d\n", i);
                        return i;
                }

And in test1.c this is how we call it...

    struct fd_set fds;
    struct timeval tv;

        FD_ZERO(&fds);
        FD_SET(s, &fds);
        tv.tv_sec = 1;
        tv.tv_usec = 0;

        rv = net_select(s +1, &fds, NULL, NULL, &tv);
        printf("select gave %d\n", rv);
        rv = net_select(s +1, NULL, &fds, NULL, &tv);
        printf("select gave %d\n", rv);
        rv = net_select(s +1, NULL, NULL, &fds, &tv);
        printf("select gave %d\n", rv);

What does it give???

NET_SOCKET_SELECT, mfd = 5
socket 2:
socket 3:
socket 4:  read bit
kernel select returned -2147483643
NET_SOCKET_SELECT, mfd = 5
socket 2:
socket 3:
socket 4:  write bit
kernel select returned -2147483643
NET_SOCKET_SELECT, mfd = 5
socket 2:
socket 3:
socket 4:  except bit
kernel select returned -2147483643

What's even stranger is that the ioctl cal seems to report it as -1 instead
of the larger value! I think the error code is EINVAL, but am not sure why
as this code works on other OS's... Perhaps I need to copy the contents? I'm
not sure so maybe someone can help! The FD headers are in a new header file
sys/select.h which are an exact copy of the Be ones!

david

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