Re: _IOR/W with if_tun

From: Jordan Abel (jmabel_at_purdue.edu)
Date: 10/29/05

  • Next message: Rob Warnock: "Re: _IOR/W with if_tun" 
    Date: Sat, 29 Oct 2005 09:57:46 +0000 (UTC)

    On 2005-10-29, bsder <snort_sam@yahoo.com> wrote:
    > Hi,
    >
    > Can anyone tell me what does the following codes do:
    >
    > /* ioctl's for get/set debug */
    > #define TUNSDEBUG _IOW('t', 90, int)
    > #define TUNGDEBUG _IOR('t', 89, int)
    > #define TUNSIFINFO _IOW('t', 91, struct tuninfo)
    > #define TUNGIFINFO _IOR('t', 92, struct tuninfo)
    > #define TUNSLMODE _IOW('t', 93, int)
    >
    > I tried to find out the implementation of the _IOR/W functions, but I
    > found nothing in the src directory.
    >
    > Can anyone please tell me where can I allocate the implemetation of
    > these _IOR/W functions?
    >
    > Thanks
    > Sam

    It probably does some bit-shifting and stuff. It is most definitely
    a macro, rather than a function.

    Here it is - /usr/include/sys/ioccom.h

  • Next message: Rob Warnock: "Re: _IOR/W with if_tun"

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