1 files changed, 29 insertions, 29 deletions

diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 6b19530905af..33016cc90f0b 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -2,16 +2,16 @@
  *  Syncookies implementation for the Linux kernel
  *
  *  Copyright (C) 1997 Andi Kleen
- *  Based on ideas by D.J.Bernstein and Eric Schenk. 
+ *  Based on ideas by D.J.Bernstein and Eric Schenk.
  *
  *      This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
  *      as published by the Free Software Foundation; either version
  *      2 of the License, or (at your option) any later version.
- * 
+ *
  *  $Id: syncookies.c,v 1.18 2002/02/01 22:01:04 davem Exp $
  *
- *  Missing: IPv6 support. 
+ *  Missing: IPv6 support.
  */
 
 #include <linux/tcp.h>
@@ -57,7 +57,7 @@ static __u32 secure_tcp_syn_cookie(__be32 saddr, __be32 daddr, __be16 sport,
         /*
          * Compute the secure sequence number.
          * The output should be:
-         *   HASH(sec1,saddr,sport,daddr,dport,sec1) + sseq + (count * 2^24)
+         *   HASH(sec1,saddr,sport,daddr,dport,sec1) + sseq + (count * 2^24)
          *      + (HASH(sec2,saddr,sport,daddr,dport,count,sec2) % 2^24).
          * Where sseq is their sequence number and count increases every
          * minute by 1.
@@ -99,17 +99,17 @@ static __u32 check_tcp_syn_cookie(__u32 cookie, __be32 saddr, __be32 daddr,
                 & COOKIEMASK;   /* Leaving the data behind */
 }
 
-/* 
+/*
  * This table has to be sorted and terminated with (__u16)-1.
  * XXX generate a better table.
  * Unresolved Issues: HIPPI with a 64k MSS is not well supported.
  */
 static __u16 const msstab[] = {
         64 - 1,
-        256 - 1,        
+        256 - 1,
         512 - 1,
         536 - 1,
-        1024 - 1,       
+        1024 - 1,
         1440 - 1,
         1460 - 1,
         4312 - 1,
@@ -128,7 +128,7 @@ __u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
         int mssind;
         const __u16 mss = *mssp;
 
-        
+
         tp->last_synq_overflow = jiffies;
 
         /* XXX sort msstab[] by probability?  Binary search? */
@@ -144,23 +144,23 @@ __u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
                                      jiffies / (HZ * 60), mssind);
 }
 
-/* 
+/*
  * This (misnamed) value is the age of syncookie which is permitted.
  * Its ideal value should be dependent on TCP_TIMEOUT_INIT and
  * sysctl_tcp_retries1. It's a rather complicated formula (exponential
  * backoff) to compute at runtime so it's currently hardcoded here.
  */
 #define COUNTER_TRIES 4
-/*  
- * Check if a ack sequence number is a valid syncookie. 
+/*
+ * Check if a ack sequence number is a valid syncookie.
  * Return the decoded mss if it is, or 0 if not.
  */
 static inline int cookie_check(struct sk_buff *skb, __u32 cookie)
 {
-        __u32 seq; 
+        __u32 seq;
         __u32 mssind;
 
-        seq = ntohl(skb->h.th->seq)-1; 
+        seq = ntohl(skb->h.th->seq)-1;
         mssind = check_tcp_syn_cookie(cookie,
                                       skb->nh.iph->saddr, skb->nh.iph->daddr,
                                       skb->h.th->source, skb->h.th->dest,
@@ -191,19 +191,19 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
         struct inet_request_sock *ireq;
         struct tcp_request_sock *treq;
         struct tcp_sock *tp = tcp_sk(sk);
-        __u32 cookie = ntohl(skb->h.th->ack_seq) - 1; 
+        __u32 cookie = ntohl(skb->h.th->ack_seq) - 1;
         struct sock *ret = sk;
-        struct request_sock *req; 
-        int mss; 
-        struct rtable *rt; 
+        struct request_sock *req;
+        int mss;
+        struct rtable *rt;
         __u8 rcv_wscale;
 
         if (!sysctl_tcp_syncookies || !skb->h.th->ack)
                 goto out;
 
-        if (time_after(jiffies, tp->last_synq_overflow + TCP_TIMEOUT_INIT) ||
+        if (time_after(jiffies, tp->last_synq_overflow + TCP_TIMEOUT_INIT) ||
             (mss = cookie_check(skb, cookie)) == 0) {
-                NET_INC_STATS_BH(LINUX_MIB_SYNCOOKIESFAILED);
+                NET_INC_STATS_BH(LINUX_MIB_SYNCOOKIESFAILED);
                 goto out;
         }
 
@@ -221,9 +221,9 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
         ireq = inet_rsk(req);
         treq = tcp_rsk(req);
         treq->rcv_isn           = ntohl(skb->h.th->seq) - 1;
-        treq->snt_isn           = cookie; 
+        treq->snt_isn           = cookie;
         req->mss                = mss;
-        ireq->rmt_port          = skb->h.th->source;
+        ireq->rmt_port          = skb->h.th->source;
         ireq->loc_addr          = skb->nh.iph->daddr;
         ireq->rmt_addr          = skb->nh.iph->saddr;
         ireq->opt               = NULL;
@@ -242,15 +242,15 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
         }
 
         ireq->snd_wscale = ireq->rcv_wscale = ireq->tstamp_ok = 0;
-        ireq->wscale_ok  = ireq->sack_ok = 0; 
-        req->expires    = 0UL; 
-        req->retrans    = 0; 
-        
+        ireq->wscale_ok  = ireq->sack_ok = 0;
+        req->expires    = 0UL;
+        req->retrans    = 0;
+
         /*
          * We need to lookup the route here to get at the correct
          * window size. We should better make sure that the window size
          * hasn't changed since we received the original syn, but I see
-         * no easy way to do this. 
+         * no easy way to do this.
          */
         {
                 struct flowi fl = { .nl_u = { .ip4_u =
@@ -266,17 +266,17 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
                 security_req_classify_flow(req, &fl);
                 if (ip_route_output_key(&rt, &fl)) {
                         reqsk_free(req);
-                        goto out; 
+                        goto out;
                 }
         }
 
         /* Try to redo what tcp_v4_send_synack did. */
         req->window_clamp = dst_metric(&rt->u.dst, RTAX_WINDOW);
         tcp_select_initial_window(tcp_full_space(sk), req->mss,
-                                  &req->rcv_wnd, &req->window_clamp, 
+                                  &req->rcv_wnd, &req->window_clamp,
                                   0, &rcv_wscale);
         /* BTW win scale with syncookies is 0 by definition */
-        ireq->rcv_wscale  = rcv_wscale; 
+        ireq->rcv_wscale  = rcv_wscale;
 
         ret = get_cookie_sock(sk, skb, req, &rt->u.dst);
 out:    return ret;