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authorMatus Fabian <matfabia@cisco.com>2018-04-04 00:38:02 -0700
committerMatus Fabian <matfabia@cisco.com>2018-04-04 00:38:43 -0700
commit4772e7ad53392e5ee78d05061ed18762bd4b8e8e (patch)
treeb7ac85a42ad8b5dc72a6993ac792465234436534 /src/plugins/nat/nat.c
parenteb4f74a54f022aa759f3ce57af23ca28e57c9f85 (diff)
NAT44: fix static mapping for DHCP addressed interface deleting (VPP-1223)
Change-Id: Ifb4d23059b7989c32a52eaf0c25c275b35e83010 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat.c')
-rw-r--r--src/plugins/nat/nat.c96
1 files changed, 92 insertions, 4 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index e3f7fba38e1..a2b4010df0b 100644
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -716,15 +716,16 @@ int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr,
if (rp_match)
return VNET_API_ERROR_VALUE_EXIST;
+ snat_add_static_mapping_when_resolved
+ (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
+ addr_only, is_add, tag);
+
/* DHCP resolution required? */
if (first_int_addr == 0)
{
- snat_add_static_mapping_when_resolved
- (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
- addr_only, is_add, tag);
return 0;
}
- else
+ else
{
e_addr.as_u32 = first_int_addr->as_u32;
/* Identity mapping? */
@@ -1774,6 +1775,15 @@ snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
u32 if_address_index,
u32 is_delete);
+static void
+nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
+ uword opaque,
+ u32 sw_if_index,
+ ip4_address_t * address,
+ u32 address_length,
+ u32 if_address_index,
+ u32 is_delete);
+
static int
nat_alloc_addr_and_port_default (snat_address_t * addresses,
u32 fib_index,
@@ -1852,6 +1862,11 @@ static clib_error_t * snat_init (vlib_main_t * vm)
vec_add1 (im->add_del_interface_address_callbacks, cb4);
+ cb4.function = nat_ip4_add_del_addr_only_sm_cb;
+ cb4.function_opaque = 0;
+
+ vec_add1 (im->add_del_interface_address_callbacks, cb4);
+
nat_dpo_module_init ();
/* Init IPFIX logging */
@@ -2733,6 +2748,77 @@ u8 * format_det_map_ses (u8 * s, va_list * args)
}
static void
+nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
+ uword opaque,
+ u32 sw_if_index,
+ ip4_address_t * address,
+ u32 address_length,
+ u32 if_address_index,
+ u32 is_delete)
+{
+ snat_main_t *sm = &snat_main;
+ snat_static_map_resolve_t *rp;
+ snat_static_mapping_t *m;
+ snat_session_key_t m_key;
+ clib_bihash_kv_8_8_t kv, value;
+ int i, rv;
+ ip4_address_t l_addr;
+
+ for (i = 0; i < vec_len (sm->to_resolve); i++)
+ {
+ rp = sm->to_resolve + i;
+ if (rp->addr_only == 0)
+ continue;
+ if (rp->sw_if_index == sw_if_index)
+ goto match;
+ }
+
+ return;
+
+match:
+ m_key.addr.as_u32 = address->as_u32;
+ m_key.port = rp->addr_only ? 0 : rp->e_port;
+ m_key.protocol = rp->addr_only ? 0 : rp->proto;
+ m_key.fib_index = sm->outside_fib_index;
+ kv.key = m_key.as_u64;
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
+ m = 0;
+ else
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+
+ if (!is_delete)
+ {
+ /* Don't trip over lease renewal, static config */
+ if (m)
+ return;
+ }
+ else
+ {
+ if (!m)
+ return;
+ }
+
+ /* Indetity mapping? */
+ if (rp->l_addr.as_u32 == 0)
+ l_addr.as_u32 = address[0].as_u32;
+ else
+ l_addr.as_u32 = rp->l_addr.as_u32;
+ /* Add the static mapping */
+ rv = snat_add_static_mapping (l_addr,
+ address[0],
+ rp->l_port,
+ rp->e_port,
+ rp->vrf_id,
+ rp->addr_only,
+ ~0 /* sw_if_index */,
+ rp->proto,
+ !is_delete,
+ 0, 0, rp->tag);
+ if (rv)
+ clib_warning ("snat_add_static_mapping returned %d", rv);
+}
+
+static void
snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
uword opaque,
u32 sw_if_index,
@@ -2778,6 +2864,8 @@ match:
for (j = 0; j < vec_len (sm->to_resolve); j++)
{
rp = sm->to_resolve + j;
+ if (rp->addr_only)
+ continue;
/* On this interface? */
if (rp->sw_if_index == sw_if_index)
{