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authorMatus Fabian <matfabia@cisco.com>2018-10-07 21:28:23 -0700
committerOle Trøan <otroan@employees.org>2018-10-08 11:46:23 +0000
commite2f4e2f175beb6d6490d275049199db7dd61c783 (patch)
tree3b8a5997a835d15aec3b58af5e9bfc7195d12f7c /src/plugins/nat/nat.c
parent2fd4b56aea5833a4752525d58cac335909190e9c (diff)
NAT44: do not create session record for identity mapping (VPP-1439)
Change-Id: I39a3146a4e4ba8eadf50af7113b9ae6b1c1d688f Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat.c')
-rwxr-xr-xsrc/plugins/nat/nat.c74
1 files changed, 34 insertions, 40 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index 0818332eeb3..ae2e64e1f82 100755
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -583,7 +583,9 @@ snat_add_static_mapping_when_resolved (snat_main_t * sm,
u16 e_port,
u32 vrf_id,
snat_protocol_t proto,
- int addr_only, int is_add, u8 * tag)
+ int addr_only, int is_add, u8 * tag,
+ int twice_nat, int out2in_only,
+ int identity_nat)
{
snat_static_map_resolve_t *rp;
@@ -596,6 +598,9 @@ snat_add_static_mapping_when_resolved (snat_main_t * sm,
rp->proto = proto;
rp->addr_only = addr_only;
rp->is_add = is_add;
+ rp->twice_nat = twice_nat;
+ rp->out2in_only = out2in_only;
+ rp->identity_nat = identity_nat;
rp->tag = vec_dup (tag);
}
@@ -613,34 +618,12 @@ get_thread_idx_by_port (u16 e_port)
return thread_idx;
}
-/**
- * @brief Add static mapping.
- *
- * Create static mapping between local addr+port and external addr+port.
- *
- * @param l_addr Local IPv4 address.
- * @param e_addr External IPv4 address.
- * @param l_port Local port number.
- * @param e_port External port number.
- * @param vrf_id VRF ID.
- * @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 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
- *
- * @returns
- */
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,
- twice_nat_type_t twice_nat, u8 out2in_only, u8 * tag)
+ twice_nat_type_t twice_nat, u8 out2in_only, u8 * tag,
+ u8 identity_nat)
{
snat_main_t *sm = &snat_main;
snat_static_mapping_t *m;
@@ -702,7 +685,7 @@ snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
snat_add_static_mapping_when_resolved
(sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
- addr_only, is_add, tag);
+ addr_only, is_add, tag, twice_nat, out2in_only, identity_nat);
/* DHCP resolution required? */
if (first_int_addr == 0)
@@ -842,11 +825,15 @@ snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
m->tag = vec_dup (tag);
m->local_addr = l_addr;
m->external_addr = e_addr;
- m->addr_only = addr_only;
m->vrf_id = vrf_id;
m->fib_index = fib_index;
m->twice_nat = twice_nat;
- m->out2in_only = out2in_only;
+ if (out2in_only)
+ m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY;
+ if (addr_only)
+ m->flags |= NAT_STATIC_MAPPING_FLAG_ADDR_ONLY;
+ if (identity_nat)
+ m->flags |= NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT;
if (!addr_only)
{
m->local_port = l_port;
@@ -1147,11 +1134,11 @@ nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
memset (m, 0, sizeof (*m));
m->tag = vec_dup (tag);
m->external_addr = e_addr;
- m->addr_only = 0;
m->external_port = e_port;
m->proto = proto;
m->twice_nat = twice_nat;
- m->out2in_only = out2in_only;
+ if (out2in_only)
+ m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY;
m->affinity = affinity;
if (affinity)
@@ -1368,9 +1355,9 @@ snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm,
if (m->external_addr.as_u32 == addr.as_u32)
(void) snat_add_static_mapping (m->local_addr, m->external_addr,
m->local_port, m->external_port,
- m->vrf_id, m->addr_only, ~0,
+ m->vrf_id, is_addr_only_static_mapping(m), ~0,
m->proto, 0, m->twice_nat,
- m->out2in_only, m->tag);
+ is_out2in_only_static_mapping(m), m->tag, is_identity_static_mapping(m));
}));
/* *INDENT-ON* */
}
@@ -1682,7 +1669,7 @@ fib:
pool_foreach (m, sm->static_mappings,
({
- if (!(m->addr_only) || (m->local_addr.as_u32 == m->external_addr.as_u32))
+ if (!(is_addr_only_static_mapping(m)) || (m->local_addr.as_u32 == m->external_addr.as_u32))
continue;
snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
@@ -1810,7 +1797,7 @@ fib:
pool_foreach (m, sm->static_mappings,
({
- if (!(m->addr_only) || (m->local_addr.as_u32 == m->external_addr.as_u32))
+ if (!((is_addr_only_static_mapping(m))) || (m->local_addr.as_u32 == m->external_addr.as_u32))
continue;
snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
@@ -2017,7 +2004,8 @@ snat_static_mapping_match (snat_main_t * sm,
u8 by_external,
u8 * is_addr_only,
twice_nat_type_t * twice_nat,
- lb_nat_type_t * lb, ip4_address_t * ext_host_addr)
+ lb_nat_type_t * lb, ip4_address_t * ext_host_addr,
+ u8 * is_identity_nat)
{
clib_bihash_kv_8_8_t kv, value;
snat_static_mapping_t *m;
@@ -2108,7 +2096,7 @@ snat_static_mapping_match (snat_main_t * sm,
mapping->fib_index = m->fib_index;
mapping->addr = m->local_addr;
/* Address only mapping doesn't change port */
- mapping->port = m->addr_only ? match.port
+ mapping->port = is_addr_only_static_mapping (m) ? match.port
: clib_host_to_net_u16 (m->local_port);
}
mapping->protocol = m->proto;
@@ -2117,18 +2105,21 @@ snat_static_mapping_match (snat_main_t * sm,
{
mapping->addr = m->external_addr;
/* Address only mapping doesn't change port */
- mapping->port = m->addr_only ? match.port
+ mapping->port = is_addr_only_static_mapping (m) ? match.port
: clib_host_to_net_u16 (m->external_port);
mapping->fib_index = sm->outside_fib_index;
}
end:
if (PREDICT_FALSE (is_addr_only != 0))
- *is_addr_only = m->addr_only;
+ *is_addr_only = is_addr_only_static_mapping (m);
if (PREDICT_FALSE (twice_nat != 0))
*twice_nat = m->twice_nat;
+ if (PREDICT_FALSE (is_identity_nat != 0))
+ *is_identity_nat = is_identity_static_mapping (m);
+
return 0;
}
@@ -2919,7 +2910,8 @@ match:
rp->e_port,
rp->vrf_id,
rp->addr_only, ~0 /* sw_if_index */ ,
- rp->proto, !is_delete, 0, 0, rp->tag);
+ rp->proto, !is_delete, rp->twice_nat,
+ rp->out2in_only, rp->tag, rp->identity_nat);
if (rv)
nat_log_notice ("snat_add_static_mapping returned %d", rv);
}
@@ -2988,7 +2980,9 @@ match:
rp->addr_only,
~0 /* sw_if_index */ ,
rp->proto,
- rp->is_add, 0, 0, rp->tag);
+ rp->is_add, rp->twice_nat,
+ rp->out2in_only, rp->tag,
+ rp->identity_nat);
if (rv)
nat_log_notice ("snat_add_static_mapping returned %d", rv);
}