[NETFILTER]: statistic match: add missing Kconfig help text

[linux-2.6-omap-h63xx.git] / net / netfilter / nf_conntrack_proto_tcp.c

diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 6492ed66fb3c6cb033d9db835cc0eac006ce8fa3..12fb7c0a15098e9050e1779f41f2acd1939a086d 100644 (file)
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -799,8 +799,7 @@ static int tcp_error(struct sk_buff *skb,
                     unsigned int dataoff,
                     enum ip_conntrack_info *ctinfo,
                     int pf,
-                    unsigned int hooknum,
-                    int(*csum)(const struct sk_buff *,unsigned int))
+                    unsigned int hooknum)
 {
        struct tcphdr _tcph, *th;
        unsigned int tcplen = skb->len - dataoff;
@@ -829,10 +828,10 @@ static int tcp_error(struct sk_buff *skb,
         * and moreover root might send raw packets.
         */
        /* FIXME: Source route IP option packets --RR */
-       if (((pf == PF_INET && hooknum == NF_IP_PRE_ROUTING) ||
-            (pf == PF_INET6 && hooknum  == NF_IP6_PRE_ROUTING))
-           && skb->ip_summed != CHECKSUM_UNNECESSARY
-           && csum(skb, dataoff)) {
+       if (nf_conntrack_checksum &&
+           ((pf == PF_INET && hooknum == NF_IP_PRE_ROUTING) ||
+            (pf == PF_INET6 && hooknum == NF_IP6_PRE_ROUTING)) &&
+           nf_checksum(skb, hooknum, dataoff, IPPROTO_TCP, pf)) {
                if (LOG_INVALID(IPPROTO_TCP))
                        nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
                                  "nf_ct_tcp: bad TCP checksum ");
@@ -851,44 +850,6 @@ static int tcp_error(struct sk_buff *skb,
        return NF_ACCEPT;
 }
 
-static int csum4(const struct sk_buff *skb, unsigned int dataoff)
-{
-       return csum_tcpudp_magic(skb->nh.iph->saddr, skb->nh.iph->daddr,
-                                skb->len - dataoff, IPPROTO_TCP,
-                                skb->ip_summed == CHECKSUM_HW ? skb->csum
-                                : skb_checksum(skb, dataoff,
-                                               skb->len - dataoff, 0));
-}
-
-static int csum6(const struct sk_buff *skb, unsigned int dataoff)
-{
-       return csum_ipv6_magic(&skb->nh.ipv6h->saddr, &skb->nh.ipv6h->daddr,
-                              skb->len - dataoff, IPPROTO_TCP,
-                              skb->ip_summed == CHECKSUM_HW
-                              ? csum_sub(skb->csum,
-                                         skb_checksum(skb, 0, dataoff, 0))
-                              : skb_checksum(skb, dataoff, skb->len - dataoff,
-                                             0));
-}
-
-static int tcp_error4(struct sk_buff *skb,
-                     unsigned int dataoff,
-                     enum ip_conntrack_info *ctinfo,
-                     int pf,
-                     unsigned int hooknum)
-{
-       return tcp_error(skb, dataoff, ctinfo, pf, hooknum, csum4);
-}
-
-static int tcp_error6(struct sk_buff *skb,
-                     unsigned int dataoff,
-                     enum ip_conntrack_info *ctinfo,
-                     int pf,
-                     unsigned int hooknum)
-{
-       return tcp_error(skb, dataoff, ctinfo, pf, hooknum, csum6);
-}
-
 /* Returns verdict for packet, or -1 for invalid. */
 static int tcp_packet(struct nf_conn *conntrack,
                      const struct sk_buff *skb,
@@ -1218,7 +1179,7 @@ struct nf_conntrack_protocol nf_conntrack_protocol_tcp4 =
        .print_conntrack        = tcp_print_conntrack,
        .packet                 = tcp_packet,
        .new                    = tcp_new,
-       .error                  = tcp_error4,
+       .error                  = tcp_error,
 #if defined(CONFIG_NF_CT_NETLINK) || \
     defined(CONFIG_NF_CT_NETLINK_MODULE)
        .to_nfattr              = tcp_to_nfattr,
@@ -1239,7 +1200,7 @@ struct nf_conntrack_protocol nf_conntrack_protocol_tcp6 =
        .print_conntrack        = tcp_print_conntrack,
        .packet                 = tcp_packet,
        .new                    = tcp_new,
-       .error                  = tcp_error6,
+       .error                  = tcp_error,
 #if defined(CONFIG_NF_CT_NETLINK) || \
     defined(CONFIG_NF_CT_NETLINK_MODULE)
        .to_nfattr              = tcp_to_nfattr,