/*
* This routine does path mtu discovery as defined in RFC1191.
*/
-static void do_pmtu_discovery(struct sock *sk, struct iphdr *iph, u32 mtu)
+static void do_pmtu_discovery(struct sock *sk, const struct iphdr *iph, u32 mtu)
{
struct dst_entry *dst;
struct inet_sock *inet = inet_sk(sk);
void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
{
- struct iphdr *iph = (struct iphdr *)icmp_skb->data;
+ const struct iphdr *iph = (const struct iphdr *)icmp_skb->data;
struct tcphdr *th = (struct tcphdr *)(icmp_skb->data + (iph->ihl << 2));
struct inet_connection_sock *icsk;
struct tcp_sock *tp;
struct sk_buff **tcp4_gro_receive(struct sk_buff **head, struct sk_buff *skb)
{
- struct iphdr *iph = skb_gro_network_header(skb);
+ const struct iphdr *iph = skb_gro_network_header(skb);
switch (skb->ip_summed) {
case CHECKSUM_COMPLETE:
int tcp4_gro_complete(struct sk_buff *skb)
{
- struct iphdr *iph = ip_hdr(skb);
+ const struct iphdr *iph = ip_hdr(skb);
struct tcphdr *th = tcp_hdr(skb);
th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb),