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- /*
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- /*
- * This file should be merged into net/if.c. The 'if_pcount' integer
- * field must be added to 'struct ifnet' in net/if.h.
- */
-
- /*
- * Set/clear promiscuous mode for the hardware interface associated
- * with 'ifp' based on the truth value of 'pswitch'. This code
- * works only with the SunOS 3.5 drivers.
- */
- ifpromisc(ifp, pswitch)
- struct ifnet *ifp;
- int pswitch;
- {
- short flags = ifp->if_flags;
-
- /*
- * If the device is not configured up, we cannot put it in
- * promiscuous mode.
- */
- if ((flags & IFF_UP) == 0)
- return ENETDOWN;
- if (pswitch) {
- if (ifp->if_pcount++ != 0)
- return 0;
- /* turn on driver */
- flags |= IFF_PROMISC;
- } else {
- if (--ifp->if_pcount > 0)
- return 0;
- /* turn off driver */
- flags &=~ IFF_PROMISC;
- }
- return (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&flags);
- }
-
-