netfilter: xtables: add struct xt_mtchk_param::net

[safe/jmp/linux-2.6] / net / ipv4 / syncookies.c

diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 6317d3c..5c24db4 100644 (file)
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -16,6 +16,7 @@
 #include <linux/cryptohash.h>
 #include <linux/kernel.h>
 #include <net/tcp.h>
+#include <net/route.h>
 
 /* Timestamps: lowest 9 bits store TCP options */
 #define TSBITS 9
@@ -36,12 +37,13 @@ __initcall(init_syncookies);
 #define COOKIEBITS 24  /* Upper bits store count */
 #define COOKIEMASK (((__u32)1 << COOKIEBITS) - 1)
 
-static DEFINE_PER_CPU(__u32, cookie_scratch)[16 + 5 + SHA_WORKSPACE_WORDS];
+static DEFINE_PER_CPU(__u32 [16 + 5 + SHA_WORKSPACE_WORDS],
+                     ipv4_cookie_scratch);
 
 static u32 cookie_hash(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport,
                       u32 count, int c)
 {
-       __u32 *tmp = __get_cpu_var(cookie_scratch);
+       __u32 *tmp = __get_cpu_var(ipv4_cookie_scratch);
 
        memcpy(tmp + 4, syncookie_secret[c], sizeof(syncookie_secret[c]));
        tmp[0] = (__force u32)saddr;
@@ -160,20 +162,19 @@ static __u16 const msstab[] = {
  */
 __u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb, __u16 *mssp)
 {
-       struct tcp_sock *tp = tcp_sk(sk);
        const struct iphdr *iph = ip_hdr(skb);
        const struct tcphdr *th = tcp_hdr(skb);
        int mssind;
        const __u16 mss = *mssp;
 
-       tp->last_synq_overflow = jiffies;
+       tcp_synq_overflow(sk);
 
        /* XXX sort msstab[] by probability?  Binary search? */
        for (mssind = 0; mss > msstab[mssind + 1]; mssind++)
                ;
        *mssp = msstab[mssind] + 1;
 
-       NET_INC_STATS_BH(LINUX_MIB_SYNCOOKIESSENT);
+       NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SYNCOOKIESSENT);
 
        return secure_tcp_syn_cookie(iph->saddr, iph->daddr,
                                     th->source, th->dest, ntohl(th->seq),
@@ -252,6 +253,8 @@ EXPORT_SYMBOL(cookie_check_timestamp);
 struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
                             struct ip_options *opt)
 {
+       struct tcp_options_received tcp_opt;
+       u8 *hash_location;
        struct inet_request_sock *ireq;
        struct tcp_request_sock *treq;
        struct tcp_sock *tp = tcp_sk(sk);
@@ -262,44 +265,40 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
        int mss;
        struct rtable *rt;
        __u8 rcv_wscale;
-       struct tcp_options_received tcp_opt;
 
        if (!sysctl_tcp_syncookies || !th->ack)
                goto out;
 
-       if (time_after(jiffies, tp->last_synq_overflow + TCP_TIMEOUT_INIT) ||
+       if (tcp_synq_no_recent_overflow(sk) ||
            (mss = cookie_check(skb, cookie)) == 0) {
-               NET_INC_STATS_BH(LINUX_MIB_SYNCOOKIESFAILED);
+               NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SYNCOOKIESFAILED);
                goto out;
        }
 
-       NET_INC_STATS_BH(LINUX_MIB_SYNCOOKIESRECV);
+       NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_SYNCOOKIESRECV);
 
        /* check for timestamp cookie support */
        memset(&tcp_opt, 0, sizeof(tcp_opt));
-       tcp_parse_options(skb, &tcp_opt, 0);
+       tcp_parse_options(skb, &tcp_opt, &hash_location, 0);
 
        if (tcp_opt.saw_tstamp)
                cookie_check_timestamp(&tcp_opt);
 
        ret = NULL;
-       req = reqsk_alloc(&tcp_request_sock_ops); /* for safety */
+       req = inet_reqsk_alloc(&tcp_request_sock_ops); /* for safety */
        if (!req)
                goto out;
 
-       if (security_inet_conn_request(sk, skb, req)) {
-               reqsk_free(req);
-               goto out;
-       }
        ireq = inet_rsk(req);
        treq = tcp_rsk(req);
        treq->rcv_isn           = ntohl(th->seq) - 1;
        treq->snt_isn           = cookie;
        req->mss                = mss;
+       ireq->loc_port          = th->dest;
        ireq->rmt_port          = th->source;
        ireq->loc_addr          = ip_hdr(skb)->daddr;
        ireq->rmt_addr          = ip_hdr(skb)->saddr;
-       ireq->opt               = NULL;
+       ireq->ecn_ok            = 0;
        ireq->snd_wscale        = tcp_opt.snd_wscale;
        ireq->rcv_wscale        = tcp_opt.rcv_wscale;
        ireq->sack_ok           = tcp_opt.sack_ok;
@@ -320,6 +319,11 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
                }
        }
 
+       if (security_inet_conn_request(sk, skb, req)) {
+               reqsk_free(req);
+               goto out;
+       }
+
        req->expires    = 0UL;
        req->retrans    = 0;
 
@@ -330,13 +334,15 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
         * no easy way to do this.
         */
        {
-               struct flowi fl = { .nl_u = { .ip4_u =
+               struct flowi fl = { .mark = sk->sk_mark,
+                                   .nl_u = { .ip4_u =
                                              { .daddr = ((opt && opt->srr) ?
                                                          opt->faddr :
                                                          ireq->rmt_addr),
                                                .saddr = ireq->loc_addr,
                                                .tos = RT_CONN_FLAGS(sk) } },
                                    .proto = IPPROTO_TCP,
+                                   .flags = inet_sk_flowi_flags(sk),
                                    .uli_u = { .ports =
                                               { .sport = th->dest,
                                                 .dport = th->source } } };
@@ -352,7 +358,8 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
 
        tcp_select_initial_window(tcp_full_space(sk), req->mss,
                                  &req->rcv_wnd, &req->window_clamp,
-                                 ireq->wscale_ok, &rcv_wscale);
+                                 ireq->wscale_ok, &rcv_wscale,
+                                 dst_metric(&rt->u.dst, RTAX_INITRWND));
 
        ireq->rcv_wscale  = rcv_wscale;