ipv4: Use flowi4's {saddr,daddr} in igmpv3_newpack() and igmp_send_report()

Instead of rt->rt_{src,dst}
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/igmp.c

@@ -344,8 +344,8 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
 	pip->tos      = 0xc0;
 	pip->frag_off = htons(IP_DF);
 	pip->ttl      = 1;
-	pip->daddr    = rt->rt_dst;
-	pip->saddr    = rt->rt_src;
+	pip->daddr    = fl4.daddr;
+	pip->saddr    = fl4.saddr;
 	pip->protocol = IPPROTO_IGMP;
 	pip->tot_len  = 0;	/* filled in later */
 	ip_select_ident(pip, &rt->dst, NULL);
@@ -687,7 +687,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
 	iph->frag_off = htons(IP_DF);
 	iph->ttl      = 1;
 	iph->daddr    = dst;
-	iph->saddr    = rt->rt_src;
+	iph->saddr    = fl4.saddr;
 	iph->protocol = IPPROTO_IGMP;
 	ip_select_ident(iph, &rt->dst, NULL);
 	((u8*)&iph[1])[0] = IPOPT_RA;