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Diffstat (limited to 'net/dccp/ipv6.c')
-rw-r--r--net/dccp/ipv6.c61
1 files changed, 16 insertions, 45 deletions
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index fa9512d86f3b..56840b249f3b 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -130,6 +130,13 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
np = inet6_sk(sk);
+ if (type == NDISC_REDIRECT) {
+ struct dst_entry *dst = __sk_dst_check(sk, np->dst_cookie);
+
+ if (dst)
+ dst->ops->redirect(dst, sk, skb);
+ }
+
if (type == ICMPV6_PKT_TOOBIG) {
struct dst_entry *dst = NULL;
@@ -138,37 +145,12 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
if ((1 << sk->sk_state) & (DCCPF_LISTEN | DCCPF_CLOSED))
goto out;
- /* icmp should have updated the destination cache entry */
- dst = __sk_dst_check(sk, np->dst_cookie);
- if (dst == NULL) {
- struct inet_sock *inet = inet_sk(sk);
- struct flowi6 fl6;
-
- /* BUGGG_FUTURE: Again, it is not clear how
- to handle rthdr case. Ignore this complexity
- for now.
- */
- memset(&fl6, 0, sizeof(fl6));
- fl6.flowi6_proto = IPPROTO_DCCP;
- fl6.daddr = np->daddr;
- fl6.saddr = np->saddr;
- fl6.flowi6_oif = sk->sk_bound_dev_if;
- fl6.fl6_dport = inet->inet_dport;
- fl6.fl6_sport = inet->inet_sport;
- security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
-
- dst = ip6_dst_lookup_flow(sk, &fl6, NULL, false);
- if (IS_ERR(dst)) {
- sk->sk_err_soft = -PTR_ERR(dst);
- goto out;
- }
- } else
- dst_hold(dst);
+ dst = inet6_csk_update_pmtu(sk, ntohl(info));
+ if (!dst)
+ goto out;
- if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
+ if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst))
dccp_sync_mss(sk, dst_mtu(dst));
- } /* else let the usual retransmit timer handle it */
- dst_release(dst);
goto out;
}
@@ -237,7 +219,6 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
struct inet6_request_sock *ireq6 = inet6_rsk(req);
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
- struct ipv6_txoptions *opt = NULL;
struct in6_addr *final_p, final;
struct flowi6 fl6;
int err = -1;
@@ -253,9 +234,8 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
fl6.fl6_sport = inet_rsk(req)->loc_port;
security_req_classify_flow(req, flowi6_to_flowi(&fl6));
- opt = np->opt;
- final_p = fl6_update_dst(&fl6, opt, &final);
+ final_p = fl6_update_dst(&fl6, np->opt, &final);
dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
if (IS_ERR(dst)) {
@@ -272,13 +252,11 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
&ireq6->loc_addr,
&ireq6->rmt_addr);
fl6.daddr = ireq6->rmt_addr;
- err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
+ err = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass);
err = net_xmit_eval(err);
}
done:
- if (opt != NULL && opt != np->opt)
- sock_kfree_s(sk, opt, opt->tot_len);
dst_release(dst);
return err;
}
@@ -473,7 +451,6 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
struct inet_sock *newinet;
struct dccp6_sock *newdp6;
struct sock *newsk;
- struct ipv6_txoptions *opt;
if (skb->protocol == htons(ETH_P_IP)) {
/*
@@ -518,7 +495,6 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
return newsk;
}
- opt = np->opt;
if (sk_acceptq_is_full(sk))
goto out_overflow;
@@ -530,7 +506,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_proto = IPPROTO_DCCP;
fl6.daddr = ireq6->rmt_addr;
- final_p = fl6_update_dst(&fl6, opt, &final);
+ final_p = fl6_update_dst(&fl6, np->opt, &final);
fl6.saddr = ireq6->loc_addr;
fl6.flowi6_oif = sk->sk_bound_dev_if;
fl6.fl6_dport = inet_rsk(req)->rmt_port;
@@ -595,11 +571,8 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
* Yes, keeping reference count would be much more clever, but we make
* one more one thing there: reattach optmem to newsk.
*/
- if (opt != NULL) {
- newnp->opt = ipv6_dup_options(newsk, opt);
- if (opt != np->opt)
- sock_kfree_s(sk, opt, opt->tot_len);
- }
+ if (np->opt != NULL)
+ newnp->opt = ipv6_dup_options(newsk, np->opt);
inet_csk(newsk)->icsk_ext_hdr_len = 0;
if (newnp->opt != NULL)
@@ -625,8 +598,6 @@ out_nonewsk:
dst_release(dst);
out:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
- if (opt != NULL && opt != np->opt)
- sock_kfree_s(sk, opt, opt->tot_len);
return NULL;
}