Le vendredi 22 avril 2011 Ã 16:19 +0900, Fernando Luis Vazquez Cao a Ãcrit : > The IPv6 header is not zeroed out in alloc_skb so we must initialize it > properly unless we want to see IPv6 packets with random TOS fields > floating around. The current implementation resets the flow label > but this could be changed if deemed necessary. > > We stumbled upon this issue when trying to apply a mangle rule to > the RST packet generated by the REJECT target module. > > Signed-off-by: Fernando Luis Vazquez Cao <fernando@xxxxxxxxxxxxx> > --- > > diff -urNp linux-2.6.38.4-orig/net/ipv6/netfilter/ip6t_REJECT.c linux-2.6.38.4/net/ipv6/netfilter/ip6t_REJECT.c > --- linux-2.6.38.4-orig/net/ipv6/netfilter/ip6t_REJECT.c 2011-03-15 10:20:32.000000000 +0900 > +++ linux-2.6.38.4/net/ipv6/netfilter/ip6t_REJECT.c 2011-04-22 15:00:30.695373543 +0900 > @@ -45,6 +45,8 @@ static void send_reset(struct net *net, > int tcphoff, needs_ack; > const struct ipv6hdr *oip6h = ipv6_hdr(oldskb); > struct ipv6hdr *ip6h; > +#define DEFAULT_TOS_VALUE 0x0U > + const __u8 tclass = DEFAULT_TOS_VALUE; > struct dst_entry *dst = NULL; > u8 proto; > struct flowi fl; > @@ -123,7 +125,7 @@ static void send_reset(struct net *net, > skb_put(nskb, sizeof(struct ipv6hdr)); > skb_reset_network_header(nskb); > ip6h = ipv6_hdr(nskb); > - ip6h->version = 6; > + *(__be32 *)ip6h = htonl(0x60000000 | (tclass << 20)); It seems fine but I am wondering where is payload_len set ? -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
