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Diffstat (limited to 'net/dccp/ipv4.c')
-rw-r--r--net/dccp/ipv4.c64
1 files changed, 21 insertions, 43 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 5b7818c63cec..8910c9567719 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -444,36 +444,6 @@ put_and_exit:
}
EXPORT_SYMBOL_GPL(dccp_v4_request_recv_sock);
-static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
-{
- const struct dccp_hdr *dh = dccp_hdr(skb);
- const struct iphdr *iph = ip_hdr(skb);
- struct sock *nsk;
- /* Find possible connection requests. */
- struct request_sock *req = inet_csk_search_req(sk, dh->dccph_sport,
- iph->saddr, iph->daddr);
- if (req) {
- nsk = dccp_check_req(sk, skb, req);
- if (!nsk)
- reqsk_put(req);
- return nsk;
- }
- nsk = inet_lookup_established(sock_net(sk), &dccp_hashinfo,
- iph->saddr, dh->dccph_sport,
- iph->daddr, dh->dccph_dport,
- inet_iif(skb));
- if (nsk != NULL) {
- if (nsk->sk_state != DCCP_TIME_WAIT) {
- bh_lock_sock(nsk);
- return nsk;
- }
- inet_twsk_put(inet_twsk(nsk));
- return NULL;
- }
-
- return sk;
-}
-
static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk,
struct sk_buff *skb)
{
@@ -705,18 +675,6 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
* NOTE: the check for the packet types is done in
* dccp_rcv_state_process
*/
- if (sk->sk_state == DCCP_LISTEN) {
- struct sock *nsk = dccp_v4_hnd_req(sk, skb);
-
- if (nsk == NULL)
- goto discard;
-
- if (nsk != sk) {
- if (dccp_child_process(sk, nsk, skb))
- goto reset;
- return 0;
- }
- }
if (dccp_rcv_state_process(sk, skb, dh, skb->len))
goto reset;
@@ -724,7 +682,6 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
reset:
dccp_v4_ctl_send_reset(sk, skb);
-discard:
kfree_skb(skb);
return 0;
}
@@ -868,6 +825,27 @@ static int dccp_v4_rcv(struct sk_buff *skb)
goto no_dccp_socket;
}
+ if (sk->sk_state == DCCP_NEW_SYN_RECV) {
+ struct request_sock *req = inet_reqsk(sk);
+ struct sock *nsk = NULL;
+
+ sk = req->rsk_listener;
+ if (sk->sk_state == DCCP_LISTEN)
+ nsk = dccp_check_req(sk, skb, req);
+ if (!nsk) {
+ reqsk_put(req);
+ goto discard_it;
+ }
+ if (nsk == sk) {
+ sock_hold(sk);
+ reqsk_put(req);
+ } else if (dccp_child_process(sk, nsk, skb)) {
+ dccp_v4_ctl_send_reset(sk, skb);
+ goto discard_it;
+ } else {
+ return 0;
+ }
+ }
/*
* RFC 4340, sec. 9.2.1: Minimum Checksum Coverage
* o if MinCsCov = 0, only packets with CsCov = 0 are accepted