struct tcphdr otcph, *tcph;
unsigned int otcplen, hh_len;
int tcphoff, needs_ack;
- struct ipv6hdr *oip6h = ipv6_hdr(oldskb), *ip6h;
+ const struct ipv6hdr *oip6h = ipv6_hdr(oldskb);
+ struct ipv6hdr *ip6h;
struct dst_entry *dst = NULL;
u8 proto;
struct flowi fl;