tcp: add init_req method to tcp_request_sock_ops
Move the specific IPv4/IPv6 intializations to a new method in
tcp_request_sock_ops in preparation for unifying tcp_v4_conn_request
and tcp_v6_conn_request.
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 5e2d7e6..87a360c 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -720,6 +720,31 @@
}
#endif
+static void tcp_v6_init_req(struct request_sock *req, struct sock *sk,
+ struct sk_buff *skb)
+{
+ struct inet_request_sock *ireq = inet_rsk(req);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ ireq->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr;
+ ireq->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;
+
+ ireq->ir_iif = sk->sk_bound_dev_if;
+
+ /* So that link locals have meaning */
+ if (!sk->sk_bound_dev_if &&
+ ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
+ ireq->ir_iif = inet6_iif(skb);
+
+ if (!TCP_SKB_CB(skb)->when &&
+ (ipv6_opt_accepted(sk, skb) || np->rxopt.bits.rxinfo ||
+ np->rxopt.bits.rxoinfo || np->rxopt.bits.rxhlim ||
+ np->rxopt.bits.rxohlim || np->repflow)) {
+ atomic_inc(&skb->users);
+ ireq->pktopts = skb;
+ }
+}
+
struct request_sock_ops tcp6_request_sock_ops __read_mostly = {
.family = AF_INET6,
.obj_size = sizeof(struct tcp6_request_sock),
@@ -730,12 +755,13 @@
.syn_ack_timeout = tcp_syn_ack_timeout,
};
-#ifdef CONFIG_TCP_MD5SIG
static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = {
+#ifdef CONFIG_TCP_MD5SIG
.md5_lookup = tcp_v6_reqsk_md5_lookup,
.calc_md5_hash = tcp_v6_md5_hash_skb,
-};
#endif
+ .init_req = tcp_v6_init_req,
+};
static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
u32 tsval, u32 tsecr, int oif,
@@ -983,13 +1009,13 @@
struct tcp_options_received tmp_opt;
struct request_sock *req;
struct inet_request_sock *ireq;
- struct ipv6_pinfo *np = inet6_sk(sk);
struct tcp_sock *tp = tcp_sk(sk);
__u32 isn = TCP_SKB_CB(skb)->when;
struct dst_entry *dst = NULL;
struct tcp_fastopen_cookie foc = { .len = -1 };
bool want_cookie = false, fastopen;
struct flowi6 fl6;
+ const struct tcp_request_sock_ops *af_ops;
int err;
if (skb->protocol == htons(ETH_P_IP))
@@ -1014,9 +1040,7 @@
if (req == NULL)
goto drop;
-#ifdef CONFIG_TCP_MD5SIG
- tcp_rsk(req)->af_specific = &tcp_request_sock_ipv6_ops;
-#endif
+ af_ops = tcp_rsk(req)->af_specific = &tcp_request_sock_ipv6_ops;
tcp_clear_options(&tmp_opt);
tmp_opt.mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr);
@@ -1030,27 +1054,12 @@
tcp_openreq_init(req, &tmp_opt, skb, sk);
ireq = inet_rsk(req);
- ireq->ir_v6_rmt_addr = ipv6_hdr(skb)->saddr;
- ireq->ir_v6_loc_addr = ipv6_hdr(skb)->daddr;
+ af_ops->init_req(req, sk, skb);
+
if (!want_cookie || tmp_opt.tstamp_ok)
TCP_ECN_create_request(req, skb, sock_net(sk));
- ireq->ir_iif = sk->sk_bound_dev_if;
-
- /* So that link locals have meaning */
- if (!sk->sk_bound_dev_if &&
- ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
- ireq->ir_iif = inet6_iif(skb);
-
if (!isn) {
- if (ipv6_opt_accepted(sk, skb) ||
- np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
- np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim ||
- np->repflow) {
- atomic_inc(&skb->users);
- ireq->pktopts = skb;
- }
-
if (want_cookie) {
isn = cookie_v6_init_sequence(sk, skb, &req->mss);
req->cookie_ts = tmp_opt.tstamp_ok;