static inline void
tcp_fast_csum_update(int af, struct tcphdr *tcph,
const union nf_inet_addr *oldip,
const union nf_inet_addr *newip,
__be16 oldport, __be16 newport)
{
#ifdef CONFIG_IP_VS_IPV6
if (af == AF_INET6)
tcph->check =
csum_fold(ip_vs_check_diff16(oldip->ip6, newip->ip6,
ip_vs_check_diff2(oldport,
newport,
~csum_unfold
(tcph->
check))));
else
#endif
tcph->check =
csum_fold(ip_vs_check_diff4(oldip->ip, newip->ip,
ip_vs_check_diff2(oldport,
newport,
~csum_unfold
(tcph->
check))));
}
static inline void
tcp_seq_csum_update(struct tcphdr *tcph, __u32 oldseq, __u32 newseq)
{
/* do checksum later */
if (!sysctl_ip_vs_csum_offload)
tcph->check = csum_fold(ip_vs_check_diff4(oldseq, newseq,
~csum_unfold(tcph->check)));
}
static inline void
syn_proxy_seq_csum_update(struct tcphdr *tcph, __u32 old_seq, __u32 new_seq)
{
tcph->check = csum_fold(ip_vs_check_diff4(old_seq, new_seq,
~csum_unfold(tcph->check)));
}
