aboutsummaryrefslogtreecommitdiffstats
path: root/net/ipv4/syncookies.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/syncookies.c')
-rw-r--r--net/ipv4/syncookies.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index d346c22aa6ae..cd2b97f1b6e1 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -161,13 +161,12 @@ static __u16 const msstab[] = {
161 */ 161 */
162__u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp) 162__u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
163{ 163{
164 struct tcp_sock *tp = tcp_sk(sk);
165 const struct iphdr *iph = ip_hdr(skb); 164 const struct iphdr *iph = ip_hdr(skb);
166 const struct tcphdr *th = tcp_hdr(skb); 165 const struct tcphdr *th = tcp_hdr(skb);
167 int mssind; 166 int mssind;
168 const __u16 mss = *mssp; 167 const __u16 mss = *mssp;
169 168
170 tp->last_synq_overflow = jiffies; 169 tcp_synq_overflow(sk);
171 170
172 /* XXX sort msstab[] by probability? Binary search? */ 171 /* XXX sort msstab[] by probability? Binary search? */
173 for (mssind = 0; mss > msstab[mssind + 1]; mssind++) 172 for (mssind = 0; mss > msstab[mssind + 1]; mssind++)
@@ -268,7 +267,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
268 if (!sysctl_tcp_syncookies || !th->ack) 267 if (!sysctl_tcp_syncookies || !th->ack)
269 goto out; 268 goto out;
270 269
271 if (time_after(jiffies, tp->last_synq_overflow + TCP_TIMEOUT_INIT) || 270 if (tcp_synq_no_recent_overflow(sk) ||
272 (mss = cookie_check(skb, cookie)) == 0) { 271 (mss = cookie_check(skb, cookie)) == 0) {
273 NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SYNCOOKIESFAILED); 272 NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SYNCOOKIESFAILED);
274 goto out; 273 goto out;
@@ -288,10 +287,6 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
288 if (!req) 287 if (!req)
289 goto out; 288 goto out;
290 289
291 if (security_inet_conn_request(sk, skb, req)) {
292 reqsk_free(req);
293 goto out;
294 }
295 ireq = inet_rsk(req); 290 ireq = inet_rsk(req);
296 treq = tcp_rsk(req); 291 treq = tcp_rsk(req);
297 treq->rcv_isn = ntohl(th->seq) - 1; 292 treq->rcv_isn = ntohl(th->seq) - 1;
@@ -322,6 +317,11 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
322 } 317 }
323 } 318 }
324 319
320 if (security_inet_conn_request(sk, skb, req)) {
321 reqsk_free(req);
322 goto out;
323 }
324
325 req->expires = 0UL; 325 req->expires = 0UL;
326 req->retrans = 0; 326 req->retrans = 0;
327 327