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authorMatus Fabian <matfabia@cisco.com>2017-11-28 04:29:41 -0800
committerOle Trøan <otroan@employees.org>2017-11-30 12:09:11 +0000
commitab7a805fbb99661b2c125268aa9d7b96c435c1d1 (patch)
tree3ef2b821274642bf959682761a77a9a2faddac17 /src/plugins/nat/nat.c
parent8389fb9112bcf96def69539fa1de13a7a08923f5 (diff)
NAT44: identity NAT (VPP-1073)
Identity mapping translate an IP address to itself. Change-Id: Icc0ca5102d32547a4b0c75720b5f5bf41ed69c71 Signed-off-by: Matus Fabian <matfabia@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat.c')
-rw-r--r--src/plugins/nat/nat.c110
1 files changed, 105 insertions, 5 deletions
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index 8c188f65709..896fe5fd59e 100644
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -733,7 +733,7 @@ delete:
pool_put (sm->static_mappings, m);
}
- if (!addr_only)
+ if (!addr_only || (l_addr.as_u32 == e_addr.as_u32))
return 0;
/* Add/delete external address to FIB */
@@ -1240,7 +1240,7 @@ fib:
pool_foreach (m, sm->static_mappings,
({
- if (!(m->addr_only))
+ if (!(m->addr_only) || (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);
@@ -1990,7 +1990,7 @@ add_static_mapping_command_fn (vlib_main_t * vm,
u32 sw_if_index = ~0;
vnet_main_t * vnm = vnet_get_main();
int rv;
- snat_protocol_t proto;
+ snat_protocol_t proto = ~0;
u8 proto_set = 0;
/* Get a line of input. */
@@ -2090,6 +2090,100 @@ VLIB_CLI_COMMAND (add_static_mapping_command, static) = {
};
static clib_error_t *
+add_identity_mapping_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ clib_error_t * error = 0;
+ ip4_address_t addr;
+ u32 port = 0, vrf_id = ~0;
+ int is_add = 1;
+ int addr_only = 1;
+ u32 sw_if_index = ~0;
+ vnet_main_t * vnm = vnet_get_main();
+ int rv;
+ snat_protocol_t proto;
+
+ addr.as_u32 = 0;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U", unformat_ip4_address, &addr))
+ ;
+ else if (unformat (line_input, "external %U",
+ unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "vrf %u", &vrf_id))
+ ;
+ else if (unformat (line_input, "%U %u", unformat_snat_protocol, &proto,
+ &port))
+ addr_only = 0;
+ else if (unformat (line_input, "del"))
+ is_add = 0;
+ else
+ {
+ error = clib_error_return (0, "unknown input: '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ rv = snat_add_static_mapping(addr, addr, (u16) port, (u16) port,
+ vrf_id, addr_only, sw_if_index, proto, is_add);
+
+ switch (rv)
+ {
+ case VNET_API_ERROR_INVALID_VALUE:
+ error = clib_error_return (0, "External port already in use.");
+ goto done;
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ if (is_add)
+ error = clib_error_return (0, "External addres must be allocated.");
+ else
+ error = clib_error_return (0, "Mapping not exist.");
+ goto done;
+ case VNET_API_ERROR_NO_SUCH_FIB:
+ error = clib_error_return (0, "No such VRF id.");
+ goto done;
+ case VNET_API_ERROR_VALUE_EXIST:
+ error = clib_error_return (0, "Mapping already exist.");
+ goto done;
+ default:
+ break;
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * @cliexpar
+ * @cliexstart{snat add identity mapping}
+ * Identity mapping translate an IP address to itself.
+ * To create identity mapping for address 10.0.0.3 port 6303 for TCP protocol
+ * use:
+ * vpp# nat44 add identity mapping 10.0.0.3 tcp 6303
+ * To create identity mapping for address 10.0.0.3 use:
+ * vpp# nat44 add identity mapping 10.0.0.3
+ * To create identity mapping for DHCP addressed interface use:
+ * vpp# nat44 add identity mapping GigabitEthernet0/a/0 tcp 3606
+ * @cliexend
+?*/
+VLIB_CLI_COMMAND (add_identity_mapping_command, static) = {
+ .path = "nat44 add identity mapping",
+ .function = add_identity_mapping_command_fn,
+ .short_help = "nat44 add identity mapping <interface>|<ip4-addr> "
+ "[<protocol> <port>] [vrf <table-id>] [del]",
+};
+
+static clib_error_t *
add_lb_static_mapping_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
@@ -2999,6 +3093,7 @@ snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
snat_main_t *sm = &snat_main;
snat_static_map_resolve_t *rp;
u32 *indices_to_delete = 0;
+ ip4_address_t l_addr;
int i, j;
int rv;
@@ -3021,8 +3116,13 @@ snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
/* On this interface? */
if (rp->sw_if_index == sw_if_index)
{
+ /* 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 (rp->l_addr,
+ rv = snat_add_static_mapping (l_addr,
address[0],
rp->l_port,
rp->e_port,
@@ -3032,7 +3132,7 @@ snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
rp->proto,
rp->is_add);
if (rv)
- clib_warning ("snat_add_static_mapping returned %d",
+ clib_warning ("snat_add_static_mapping returned %d",
rv);
vec_add1 (indices_to_delete, j);
}