fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / net / ipv4 / netfilter / ip_nat_rule.c

diff --git a/net/ipv4/netfilter/ip_nat_rule.c b/net/ipv4/netfilter/ip_nat_rule.c
index 581f097..a176aa3 100644 (file)
--- a/net/ipv4/netfilter/ip_nat_rule.c
+++ b/net/ipv4/netfilter/ip_nat_rule.c
@@ -19,14 +19,10 @@
 #include <net/route.h>
 #include <linux/bitops.h>
 
-#define ASSERT_READ_LOCK(x) MUST_BE_READ_LOCKED(&ip_nat_lock)
-#define ASSERT_WRITE_LOCK(x) MUST_BE_WRITE_LOCKED(&ip_nat_lock)
-
 #include <linux/netfilter_ipv4/ip_tables.h>
 #include <linux/netfilter_ipv4/ip_nat.h>
 #include <linux/netfilter_ipv4/ip_nat_core.h>
 #include <linux/netfilter_ipv4/ip_nat_rule.h>
-#include <linux/netfilter_ipv4/listhelp.h>
 
 #if 0
 #define DEBUGP printk
@@ -95,6 +91,7 @@ static struct ipt_table nat_table = {
        .valid_hooks    = NAT_VALID_HOOKS,
        .lock           = RW_LOCK_UNLOCKED,
        .me             = THIS_MODULE,
+       .af             = AF_INET,
 };
 
 /* Source NAT */
@@ -102,8 +99,8 @@ static unsigned int ipt_snat_target(struct sk_buff **pskb,
                                    const struct net_device *in,
                                    const struct net_device *out,
                                    unsigned int hooknum,
-                                   const void *targinfo,
-                                   void *userinfo)
+                                   const struct ipt_target *target,
+                                   const void *targinfo)
 {
        struct ip_conntrack *ct;
        enum ip_conntrack_info ctinfo;
@@ -122,7 +119,7 @@ static unsigned int ipt_snat_target(struct sk_buff **pskb,
 }
 
 /* Before 2.6.11 we did implicit source NAT if required. Warn about change. */
-static void warn_if_extra_mangle(u32 dstip, u32 srcip)
+static void warn_if_extra_mangle(__be32 dstip, __be32 srcip)
 {
        static int warned = 0;
        struct flowi fl = { .nl_u = { .ip4_u = { .daddr = dstip } } };
@@ -144,8 +141,8 @@ static unsigned int ipt_dnat_target(struct sk_buff **pskb,
                                    const struct net_device *in,
                                    const struct net_device *out,
                                    unsigned int hooknum,
-                                   const void *targinfo,
-                                   void *userinfo)
+                                   const struct ipt_target *target,
+                                   const void *targinfo)
 {
        struct ip_conntrack *ct;
        enum ip_conntrack_info ctinfo;
@@ -168,9 +165,9 @@ static unsigned int ipt_dnat_target(struct sk_buff **pskb,
 }
 
 static int ipt_snat_checkentry(const char *tablename,
-                              const struct ipt_entry *e,
+                              const void *entry,
+                              const struct ipt_target *target,
                               void *targinfo,
-                              unsigned int targinfosize,
                               unsigned int hook_mask)
 {
        struct ip_nat_multi_range_compat *mr = targinfo;
@@ -180,30 +177,13 @@ static int ipt_snat_checkentry(const char *tablename,
                printk("SNAT: multiple ranges no longer supported\n");
                return 0;
        }
-
-       if (targinfosize != IPT_ALIGN(sizeof(struct ip_nat_multi_range_compat))) {
-               DEBUGP("SNAT: Target size %u wrong for %u ranges\n",
-                      targinfosize, mr->rangesize);
-               return 0;
-       }
-
-       /* Only allow these for NAT. */
-       if (strcmp(tablename, "nat") != 0) {
-               DEBUGP("SNAT: wrong table %s\n", tablename);
-               return 0;
-       }
-
-       if (hook_mask & ~(1 << NF_IP_POST_ROUTING)) {
-               DEBUGP("SNAT: hook mask 0x%x bad\n", hook_mask);
-               return 0;
-       }
        return 1;
 }
 
 static int ipt_dnat_checkentry(const char *tablename,
-                              const struct ipt_entry *e,
+                              const void *entry,
+                              const struct ipt_target *target,
                               void *targinfo,
-                              unsigned int targinfosize,
                               unsigned int hook_mask)
 {
        struct ip_nat_multi_range_compat *mr = targinfo;
@@ -213,24 +193,6 @@ static int ipt_dnat_checkentry(const char *tablename,
                printk("DNAT: multiple ranges no longer supported\n");
                return 0;
        }
-
-       if (targinfosize != IPT_ALIGN(sizeof(struct ip_nat_multi_range_compat))) {
-               DEBUGP("DNAT: Target size %u wrong for %u ranges\n",
-                      targinfosize, mr->rangesize);
-               return 0;
-       }
-
-       /* Only allow these for NAT. */
-       if (strcmp(tablename, "nat") != 0) {
-               DEBUGP("DNAT: wrong table %s\n", tablename);
-               return 0;
-       }
-
-       if (hook_mask & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_OUT))) {
-               DEBUGP("DNAT: hook mask 0x%x bad\n", hook_mask);
-               return 0;
-       }
-       
        return 1;
 }
 
@@ -243,7 +205,7 @@ alloc_null_binding(struct ip_conntrack *conntrack,
           per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED).
           Use reply in case it's already been mangled (eg local packet).
        */
-       u_int32_t ip
+       __be32 ip
                = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
                   ? conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip
                   : conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip);
@@ -255,6 +217,27 @@ alloc_null_binding(struct ip_conntrack *conntrack,
        return ip_nat_setup_info(conntrack, &range, hooknum);
 }
 
+unsigned int
+alloc_null_binding_confirmed(struct ip_conntrack *conntrack,
+                             struct ip_nat_info *info,
+                             unsigned int hooknum)
+{
+       __be32 ip
+               = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
+                  ? conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip
+                  : conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip);
+       u_int16_t all
+               = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC
+                  ? conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u.all
+                  : conntrack->tuplehash[IP_CT_DIR_REPLY].tuple.src.u.all);
+       struct ip_nat_range range
+               = { IP_NAT_RANGE_MAP_IPS, ip, ip, { all }, { all } };
+
+       DEBUGP("Allocating NULL binding for confirmed %p (%u.%u.%u.%u)\n",
+              conntrack, NIPQUAD(ip));
+       return ip_nat_setup_info(conntrack, &range, hooknum);
+}
+
 int ip_nat_rule_find(struct sk_buff **pskb,
                     unsigned int hooknum,
                     const struct net_device *in,
@@ -264,7 +247,7 @@ int ip_nat_rule_find(struct sk_buff **pskb,
 {
        int ret;
 
-       ret = ipt_do_table(pskb, hooknum, in, out, &nat_table, NULL);
+       ret = ipt_do_table(pskb, hooknum, in, out, &nat_table);
 
        if (ret == NF_ACCEPT) {
                if (!ip_nat_initialized(ct, HOOK2MANIP(hooknum)))
@@ -277,12 +260,18 @@ int ip_nat_rule_find(struct sk_buff **pskb,
 static struct ipt_target ipt_snat_reg = {
        .name           = "SNAT",
        .target         = ipt_snat_target,
+       .targetsize     = sizeof(struct ip_nat_multi_range_compat),
+       .table          = "nat",
+       .hooks          = 1 << NF_IP_POST_ROUTING,
        .checkentry     = ipt_snat_checkentry,
 };
 
 static struct ipt_target ipt_dnat_reg = {
        .name           = "DNAT",
        .target         = ipt_dnat_target,
+       .targetsize     = sizeof(struct ip_nat_multi_range_compat),
+       .table          = "nat",
+       .hooks          = (1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_LOCAL_OUT),
        .checkentry     = ipt_dnat_checkentry,
 };