[NETFILTER]: xt_conntrack: clean up overly long lines

Also fix some whitespace errors and use the NAT bits instead of deriving
the state manually.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/netfilter/xt_conntrack.c b/net/netfilter/xt_conntrack.c
index 39c57e9f756353f6112b78e5126a40e310acfee3..0ea501a2fda5b03458ef0bdc510e36ef7f28660a 100644 (file)
--- a/net/netfilter/xt_conntrack.c
+++ b/net/netfilter/xt_conntrack.c
@@ -45,7 +45,7 @@ match(const struct sk_buff *skb,
 
        ct = ip_conntrack_get((struct sk_buff *)skb, &ctinfo);
 
-#define FWINV(bool,invflg) ((bool) ^ !!(sinfo->invflags & invflg))
+#define FWINV(bool, invflg) ((bool) ^ !!(sinfo->invflags & invflg))
 
        if (ct == &ip_conntrack_untracked)
                statebit = XT_CONNTRACK_STATE_UNTRACKED;
@@ -54,63 +54,72 @@ match(const struct sk_buff *skb,
        else
                statebit = XT_CONNTRACK_STATE_INVALID;
  
-       if(sinfo->flags & XT_CONNTRACK_STATE) {
+       if (sinfo->flags & XT_CONNTRACK_STATE) {
                if (ct) {
-                       if(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip !=
-                           ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip)
+                       if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
                                statebit |= XT_CONNTRACK_STATE_SNAT;
-
-                       if(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip !=
-                           ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip)
+                       if (test_bit(IPS_DST_NAT_BIT, &ct->status))
                                statebit |= XT_CONNTRACK_STATE_DNAT;
                }
-
-               if (FWINV((statebit & sinfo->statemask) == 0, XT_CONNTRACK_STATE))
+               if (FWINV((statebit & sinfo->statemask) == 0,
+                         XT_CONNTRACK_STATE))
                        return 0;
        }
 
-       if(sinfo->flags & XT_CONNTRACK_PROTO) {
-               if (!ct || FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum != sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum, XT_CONNTRACK_PROTO))
-                       return 0;
-       }
-
-       if(sinfo->flags & XT_CONNTRACK_ORIGSRC) {
-               if (!ct || FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip&sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) != sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip, XT_CONNTRACK_ORIGSRC))
+       if (ct == NULL) {
+               if (sinfo->flags & ~XT_CONNTRACK_STATE)
                        return 0;
+               return 1;
        }
 
-       if(sinfo->flags & XT_CONNTRACK_ORIGDST) {
-               if (!ct || FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip&sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) != sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip, XT_CONNTRACK_ORIGDST))
-                       return 0;
-       }
-
-       if(sinfo->flags & XT_CONNTRACK_REPLSRC) {
-               if (!ct || FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip&sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) != sinfo->tuple[IP_CT_DIR_REPLY].src.ip, XT_CONNTRACK_REPLSRC))
-                       return 0;
-       }
+       if (sinfo->flags & XT_CONNTRACK_PROTO &&
+           FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum !=
+                 sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
+                 XT_CONNTRACK_PROTO))
+                return 0;
+
+       if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
+           FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip &
+                  sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
+                 sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
+                 XT_CONNTRACK_ORIGSRC))
+               return 0;
 
-       if(sinfo->flags & XT_CONNTRACK_REPLDST) {
-               if (!ct || FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip&sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) != sinfo->tuple[IP_CT_DIR_REPLY].dst.ip, XT_CONNTRACK_REPLDST))
-                       return 0;
-       }
+       if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
+           FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip &
+                  sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
+                 sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
+                 XT_CONNTRACK_ORIGDST))
+               return 0;
 
-       if(sinfo->flags & XT_CONNTRACK_STATUS) {
-               if (!ct || FWINV((ct->status & sinfo->statusmask) == 0, XT_CONNTRACK_STATUS))
-                       return 0;
-       }
+       if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
+           FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip &
+                  sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
+                 sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
+                 XT_CONNTRACK_REPLSRC))
+               return 0;
 
-       if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
-               unsigned long expires;
+       if (sinfo->flags & XT_CONNTRACK_REPLDST &&
+           FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip &
+                  sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
+                 sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
+                 XT_CONNTRACK_REPLDST))
+               return 0;
 
-               if(!ct)
-                       return 0;
+       if (sinfo->flags & XT_CONNTRACK_STATUS &&
+           FWINV((ct->status & sinfo->statusmask) == 0,
+                 XT_CONNTRACK_STATUS))
+               return 0;
 
-               expires = timer_pending(&ct->timeout) ? (ct->timeout.expires - jiffies)/HZ : 0;
+       if (sinfo->flags & XT_CONNTRACK_EXPIRES) {
+               unsigned long expires = timer_pending(&ct->timeout) ?
+                                       (ct->timeout.expires - jiffies)/HZ : 0;
 
-               if (FWINV(!(expires >= sinfo->expires_min && expires <= sinfo->expires_max), XT_CONNTRACK_EXPIRES))
+               if (FWINV(!(expires >= sinfo->expires_min &&
+                           expires <= sinfo->expires_max),
+                         XT_CONNTRACK_EXPIRES))
                        return 0;
        }
-
        return 1;
 }
 
@@ -141,63 +150,72 @@ match(const struct sk_buff *skb,
        else
                statebit = XT_CONNTRACK_STATE_INVALID;
  
-       if(sinfo->flags & XT_CONNTRACK_STATE) {
+       if (sinfo->flags & XT_CONNTRACK_STATE) {
                if (ct) {
-                       if(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip !=
-                           ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip)
+                       if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
                                statebit |= XT_CONNTRACK_STATE_SNAT;
-
-                       if(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip !=
-                           ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip)
+                       if (test_bit(IPS_DST_NAT_BIT, &ct->status))
                                statebit |= XT_CONNTRACK_STATE_DNAT;
                }
-
-               if (FWINV((statebit & sinfo->statemask) == 0, XT_CONNTRACK_STATE))
+               if (FWINV((statebit & sinfo->statemask) == 0,
+                         XT_CONNTRACK_STATE))
                        return 0;
        }
 
-       if(sinfo->flags & XT_CONNTRACK_PROTO) {
-               if (!ct || FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum != sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum, XT_CONNTRACK_PROTO))
-                       return 0;
-       }
-
-       if(sinfo->flags & XT_CONNTRACK_ORIGSRC) {
-               if (!ct || FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip&sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) != sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip, XT_CONNTRACK_ORIGSRC))
+       if (ct == NULL) {
+               if (sinfo->flags & ~XT_CONNTRACK_STATE)
                        return 0;
+               return 1;
        }
 
-       if(sinfo->flags & XT_CONNTRACK_ORIGDST) {
-               if (!ct || FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip&sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) != sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip, XT_CONNTRACK_ORIGDST))
-                       return 0;
-       }
-
-       if(sinfo->flags & XT_CONNTRACK_REPLSRC) {
-               if (!ct || FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip&sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) != sinfo->tuple[IP_CT_DIR_REPLY].src.ip, XT_CONNTRACK_REPLSRC))
-                       return 0;
-       }
+       if (sinfo->flags & XT_CONNTRACK_PROTO &&
+           FWINV(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum !=
+                 sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.protonum,
+                 XT_CONNTRACK_PROTO))
+                return 0;
+
+       if (sinfo->flags & XT_CONNTRACK_ORIGSRC &&
+           FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip &
+                  sinfo->sipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
+                 sinfo->tuple[IP_CT_DIR_ORIGINAL].src.ip,
+                 XT_CONNTRACK_ORIGSRC))
+               return 0;
 
-       if(sinfo->flags & XT_CONNTRACK_REPLDST) {
-               if (!ct || FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip&sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) != sinfo->tuple[IP_CT_DIR_REPLY].dst.ip, XT_CONNTRACK_REPLDST))
-                       return 0;
-       }
+       if (sinfo->flags & XT_CONNTRACK_ORIGDST &&
+           FWINV((ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.ip &
+                  sinfo->dipmsk[IP_CT_DIR_ORIGINAL].s_addr) !=
+                 sinfo->tuple[IP_CT_DIR_ORIGINAL].dst.ip,
+                 XT_CONNTRACK_ORIGDST))
+               return 0;
 
-       if(sinfo->flags & XT_CONNTRACK_STATUS) {
-               if (!ct || FWINV((ct->status & sinfo->statusmask) == 0, XT_CONNTRACK_STATUS))
-                       return 0;
-       }
+       if (sinfo->flags & XT_CONNTRACK_REPLSRC &&
+           FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip &
+                  sinfo->sipmsk[IP_CT_DIR_REPLY].s_addr) !=
+                 sinfo->tuple[IP_CT_DIR_REPLY].src.ip,
+                 XT_CONNTRACK_REPLSRC))
+               return 0;
 
-       if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
-               unsigned long expires;
+       if (sinfo->flags & XT_CONNTRACK_REPLDST &&
+           FWINV((ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip &
+                  sinfo->dipmsk[IP_CT_DIR_REPLY].s_addr) !=
+                 sinfo->tuple[IP_CT_DIR_REPLY].dst.ip,
+                 XT_CONNTRACK_REPLDST))
+               return 0;
 
-               if(!ct)
-                       return 0;
+       if (sinfo->flags & XT_CONNTRACK_STATUS &&
+           FWINV((ct->status & sinfo->statusmask) == 0,
+                 XT_CONNTRACK_STATUS))
+               return 0;
 
-               expires = timer_pending(&ct->timeout) ? (ct->timeout.expires - jiffies)/HZ : 0;
+       if(sinfo->flags & XT_CONNTRACK_EXPIRES) {
+               unsigned long expires = timer_pending(&ct->timeout) ?
+                                       (ct->timeout.expires - jiffies)/HZ : 0;
 
-               if (FWINV(!(expires >= sinfo->expires_min && expires <= sinfo->expires_max), XT_CONNTRACK_EXPIRES))
+               if (FWINV(!(expires >= sinfo->expires_min &&
+                           expires <= sinfo->expires_max),
+                         XT_CONNTRACK_EXPIRES))
                        return 0;
        }
-
        return 1;
 }
 
@@ -220,8 +238,7 @@ checkentry(const char *tablename,
        return 1;
 }
 
-static void
-destroy(const struct xt_match *match, void *matchinfo)
+static void destroy(const struct xt_match *match, void *matchinfo)
 {
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
        nf_ct_l3proto_module_put(match->family);