d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Don't add an item to the multicast linked list if it's already

Browse Source 
on the list.
This commit is contained in:
Julian Elischer 1997-07-07 17:36:06 +00:00
parent 791d2c2871
commit 57af792293
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=27265
1 changed files with 14 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
sys/net/if.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)if.c 8.3 (Berkeley) 1/4/94
* $Id: if.c,v 1.47 1997/04/27 20:00:56 wollman Exp $
* $Id: if.c,v 1.48 1997/05/03 21:07:13 peter Exp $
*/
#include <sys/param.h>
@ -835,16 +835,18 @@ if_addmulti(ifp, sa, retifma)
int error, s;
struct ifmultiaddr *ifma;
/*
* If the matching multicast address already exists
* then don't add a new one, just add a reference
*/
for (ifma = ifp->if_multiaddrs.lh_first; ifma;
ifma = ifma->ifma_link.le_next) {
if (equal(sa, ifma->ifma_addr))
break;
}
if (ifma) {
ifma->ifma_refcount++;
if (retifma) *retifma = ifma;
return 0;
if (equal(sa, ifma->ifma_addr)) {
ifma->ifma_refcount++;
if (retifma)
*retifma = ifma;
return 0;
}
}
/*
@ -896,10 +898,10 @@ if_addmulti(ifp, sa, retifma)
ifma->ifma_addr = dupsa;
ifma->ifma_ifp = ifp;
ifma->ifma_refcount = 1;
s = splimp();
LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
splx(s);
}
s = splimp();
LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
splx(s);
}
/*
* We are certain we have added something, so call down to the