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postpone the sending of IGMP LEAVE msg to after deleting the

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mc address from the address list. The latter operation on some
hardware resets the card, potentially canceling the pending LEAVE
pkt.
This commit is contained in:
Luigi Rizzo 1999-04-24 12:28:51 +00:00
parent c1eefce941
commit 88a5354ece
1 changed files with 8 additions and 2 deletions
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10
sys/netinet/in.c
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@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)in.c 8.4 (Berkeley) 1/9/95
* $Id: in.c,v 1.38 1998/06/07 17:12:13 dfr Exp $
* $Id: in.c,v 1.39 1998/12/07 05:41:10 eivind Exp $
*/
#include <sys/param.h>
@ -576,19 +576,25 @@ in_delmulti(inm)
register struct in_multi *inm;
{
struct ifmultiaddr *ifma = inm->inm_ifma;
struct in_multi my_inm;
int s = splnet();
my_inm.inm_ifp = NULL ; /* don't send the leave msg */
if (ifma->ifma_refcount == 1) {
/*
* No remaining claims to this record; let IGMP know that
* we are leaving the multicast group.
* But do it after the if_delmulti() which might reset
* the interface and nuke the packet.
*/
igmp_leavegroup(inm);
my_inm = *inm ;
ifma->ifma_protospec = 0;
LIST_REMOVE(inm, inm_link);
free(inm, M_IPMADDR);
}
/* XXX - should be separate API for when we have an ifma? */
if_delmulti(ifma->ifma_ifp, ifma->ifma_addr);
if (my_inm.inm_ifp != NULL)
igmp_leavegroup(&my_inm);
splx(s);
}