diff options
Diffstat (limited to 'net/ipv4/netfilter/nf_nat_rule.c')
| -rw-r--r-- | net/ipv4/netfilter/nf_nat_rule.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/net/ipv4/netfilter/nf_nat_rule.c b/net/ipv4/netfilter/nf_nat_rule.c index 98ed78281aee..21c30426480b 100644 --- a/net/ipv4/netfilter/nf_nat_rule.c +++ b/net/ipv4/netfilter/nf_nat_rule.c @@ -28,7 +28,8 @@ #define NAT_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | \ (1 << NF_INET_POST_ROUTING) | \ - (1 << NF_INET_LOCAL_OUT)) + (1 << NF_INET_LOCAL_OUT) | \ + (1 << NF_INET_LOCAL_IN)) static const struct xt_table nat_table = { .name = "nat", @@ -45,7 +46,8 @@ ipt_snat_target(struct sk_buff *skb, const struct xt_action_param *par) enum ip_conntrack_info ctinfo; const struct nf_nat_multi_range_compat *mr = par->targinfo; - NF_CT_ASSERT(par->hooknum == NF_INET_POST_ROUTING); + NF_CT_ASSERT(par->hooknum == NF_INET_POST_ROUTING || + par->hooknum == NF_INET_LOCAL_IN); ct = nf_ct_get(skb, &ctinfo); @@ -99,21 +101,20 @@ static int ipt_dnat_checkentry(const struct xt_tgchk_param *par) return 0; } -unsigned int +static unsigned int alloc_null_binding(struct nf_conn *ct, unsigned int hooknum) { /* Force range to this IP; let proto decide mapping for per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED). - Use reply in case it's already been mangled (eg local packet). */ - __be32 ip - = (HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC - ? ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip - : ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip); - struct nf_nat_range range - = { IP_NAT_RANGE_MAP_IPS, ip, ip, { 0 }, { 0 } }; - - pr_debug("Allocating NULL binding for %p (%pI4)\n", ct, &ip); + struct nf_nat_range range; + + range.flags = 0; + pr_debug("Allocating NULL binding for %p (%pI4)\n", ct, + HOOK2MANIP(hooknum) == IP_NAT_MANIP_SRC ? + &ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3.ip : + &ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3.ip); + return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum)); } @@ -141,7 +142,7 @@ static struct xt_target ipt_snat_reg __read_mostly = { .target = ipt_snat_target, .targetsize = sizeof(struct nf_nat_multi_range_compat), .table = "nat", - .hooks = 1 << NF_INET_POST_ROUTING, + .hooks = (1 << NF_INET_POST_ROUTING) | (1 << NF_INET_LOCAL_IN), .checkentry = ipt_snat_checkentry, .family = AF_INET, }; |