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authorJuraj Sloboda <jsloboda@cisco.com>2018-04-10 13:51:54 +0200
committerDamjan Marion <dmarion.lists@gmail.com>2018-04-19 10:35:13 +0000
commit1e5c07d379a092f4829e7081aa962d013b31fdfc (patch)
tree1b1a3c386663b3356773cf374b55a64f14d43709 /src/plugins/nat/nat.c
parentb14826e459302556febb391456ea90644278645a (diff)
Add special Twice-NAT feature (VPP-1221)
When enabled then Twice-NAT is applied only when source IP equals destination IP after DNAT Change-Id: I58a9d1d222b2a10c83eafffb2107f32c1b4aa3a8 Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat.c')
-rwxr-xr-xsrc/plugins/nat/nat.c25
1 files changed, 18 insertions, 7 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index 51fbb1336e1..499f3a242cb 100755
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -669,7 +669,11 @@ snat_add_static_mapping_when_resolved (snat_main_t * sm,
* @param addr_only If 0 address port and pair mapping, otherwise address only.
* @param sw_if_index External port instead of specific IP address.
* @param is_add If 0 delete static mapping, otherwise add.
- * @param twice_nat If 1 translate external host address and port.
+ * @param twice_nat If value is TWICE_NAT then translate external host address
+ * and port.
+ * If value is TWICE_NAT_SELF then translate external host
+ * address and port whenever external host address equals
+ * local address of internal host.
* @param out2in_only If 1 rule match only out2in direction
* @param tag - opaque string tag
*
@@ -678,7 +682,8 @@ snat_add_static_mapping_when_resolved (snat_main_t * sm,
int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr,
u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
u32 sw_if_index, snat_protocol_t proto, int is_add,
- u8 twice_nat, u8 out2in_only, u8 * tag)
+ twice_nat_type_t twice_nat, u8 out2in_only,
+ u8 * tag)
{
snat_main_t * sm = &snat_main;
snat_static_mapping_t *m;
@@ -1159,7 +1164,8 @@ static int lb_local_exists (nat44_lb_addr_port_t * local,
int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
snat_protocol_t proto, u32 vrf_id,
nat44_lb_addr_port_t *locals, u8 is_add,
- u8 twice_nat, u8 out2in_only, u8 *tag)
+ twice_nat_type_t twice_nat, u8 out2in_only,
+ u8 *tag)
{
snat_main_t * sm = &snat_main;
snat_static_mapping_t *m;
@@ -1993,7 +1999,7 @@ int snat_static_mapping_match (snat_main_t * sm,
snat_session_key_t * mapping,
u8 by_external,
u8 *is_addr_only,
- u8 *twice_nat,
+ twice_nat_type_t *twice_nat,
u8 *lb)
{
clib_bihash_kv_8_8_t kv, value;
@@ -2741,7 +2747,9 @@ u8 * format_snat_static_mapping (u8 * s, va_list * args)
s = format (s, "local %U external %U vrf %d %s",
format_ip4_address, &m->local_addr,
format_ip4_address, &m->external_addr,
- m->vrf_id, m->twice_nat ? "twice-nat" : "");
+ m->vrf_id,
+ m->twice_nat == TWICE_NAT ? "twice-nat" :
+ m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "");
else
{
if (vec_len (m->locals))
@@ -2750,7 +2758,8 @@ u8 * format_snat_static_mapping (u8 * s, va_list * args)
format_snat_protocol, m->proto,
m->vrf_id,
format_ip4_address, &m->external_addr, m->external_port,
- m->twice_nat ? "twice-nat" : "",
+ m->twice_nat == TWICE_NAT ? "twice-nat" :
+ m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
m->out2in_only ? "out2in-only" : "");
vec_foreach (local, m->locals)
s = format (s, "\n local %U:%d probability %d\%",
@@ -2762,7 +2771,9 @@ u8 * format_snat_static_mapping (u8 * s, va_list * args)
format_snat_protocol, m->proto,
format_ip4_address, &m->local_addr, m->local_port,
format_ip4_address, &m->external_addr, m->external_port,
- m->vrf_id, m->twice_nat ? "twice-nat" : "",
+ m->vrf_id,
+ m->twice_nat == TWICE_NAT ? "twice-nat" :
+ m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
m->out2in_only ? "out2in-only" : "");
}
return s;