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devip: do not icmp reply on multicast destination

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This commit is contained in:
cinap_lenrek 2018-06-11 03:14:28 +02:00
parent d497eb2d2f
commit 94f6f89ac1
1 changed files with 3 additions and 3 deletions
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6
sys/src/9/ip/icmp6.c
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@ -430,7 +430,7 @@ icmphostunr6(Fs *f, Ipifc *ifc, Block *bp, int code, int tome)
uchar ia[IPaddrlen];
p = (Ip6hdr *)bp->rp;
if(isv6mcast(p->src) || !ipv6local(ifc, ia, p->src))
if(isv6mcast(p->dst) || isv6mcast(p->src) || !ipv6local(ifc, ia, p->src))
return;
netlog(f, Logicmp, "send icmphostunr %I -> src %I dst %I\n",
@ -467,7 +467,7 @@ icmpttlexceeded6(Fs *f, Ipifc *ifc, Block *bp)
uchar ia[IPaddrlen];
p = (Ip6hdr *)bp->rp;
if(isv6mcast(p->src) || !ipv6local(ifc, ia, p->src))
if(isv6mcast(p->dst) || isv6mcast(p->src) || !ipv6local(ifc, ia, p->src))
return;
netlog(f, Logicmp, "send icmpttlexceeded6 %I -> src %I dst %I\n",
@ -500,7 +500,7 @@ icmppkttoobig6(Fs *f, Ipifc *ifc, Block *bp)
uchar ia[IPaddrlen];
p = (Ip6hdr *)bp->rp;
if(isv6mcast(p->src) || !ipv6local(ifc, ia, p->src))
if(isv6mcast(p->dst) || isv6mcast(p->src) || !ipv6local(ifc, ia, p->src))
return;
netlog(f, Logicmp, "send icmppkttoobig6 %I -> src %I dst %I\n",