# \[PATCH\]\[MCAST\]IPv6: small fix for ip6\_mc\_msfilter(...)

- From: Yan Zheng \<hidden\>
- Date: 2005-10-31 02:51:12 
- List: netdev
- Page: https://ratatoskr.run/netdev/2005/10/776869
- Thread: https://ratatoskr.run/netdev/2005/10/776869/t.md

```text
Hi.
I think ip6_mc_add_src(...) should be called when number of sources is zero and filter mode is exclude.

Regards



Signed-off-by: Yan Zheng <redacted>

Index: net/ipv6/mcast.c
================================================================================
--- linux-2.6.14/net/ipv6/mcast.c	2005-10-30 23:09:33.000000000 +0800
+++ linux/net/ipv6/mcast.c	2005-10-31 10:37:36.000000000 +0800
@@ -545,8 +545,10 @@ int ip6_mc_msfilter(struct sock *sk, str
			sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
			goto done;
		}
-	} else
+	} else {
		newpsl = NULL;
+		ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
+	}
	psl = pmc->sflist;
	if (psl) {
		(void) ip6_mc_del_src(idev, group, pmc->sfmode,
```