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Log a message about entering or leaving permanently promiscuous mode,

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as it is done for usual promiscuous mode already.  This info is important
because promiscuous mode in the hands of a malicious party can jeopardize
the whole network.
This commit is contained in:
Yaroslav Tykhiy 2005-10-03 01:47:43 +00:00
parent 5032ff8197
commit 7aebc5e86e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=150844
1 changed files with 10 additions and 6 deletions
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16
sys/net/if.c
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@ -1266,14 +1266,18 @@ ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
if_up(ifp);
splx(s);
}
/* See if permanently promiscuous mode bit is about to flip */
if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
if (new_flags & IFF_PPROMISC)
ifp->if_flags |= IFF_PROMISC;
else if (ifp->if_pcount == 0)
ifp->if_flags &= ~IFF_PROMISC;
log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
ifp->if_xname,
(new_flags & IFF_PPROMISC) ? "enabled" : "disabled");
}
ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
(new_flags &~ IFF_CANTCHANGE);
if (new_flags & IFF_PPROMISC) {
/* Permanently promiscuous mode requested */
ifp->if_flags |= IFF_PROMISC;
} else if (ifp->if_pcount == 0) {
ifp->if_flags &= ~IFF_PROMISC;
}
if (ifp->if_ioctl) {
IFF_LOCKGIANT(ifp);
(void) (*ifp->if_ioctl)(ifp, cmd, data);