2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vnet/vxlan/vxlan.h>
17 vxlan_main_t vxlan_main;
19 static u8 * format_decap_next (u8 * s, va_list * args)
21 u32 next_index = va_arg (*args, u32);
25 case VXLAN_INPUT_NEXT_DROP:
26 return format (s, "drop");
27 case VXLAN_INPUT_NEXT_L2_INPUT:
28 return format (s, "l2");
29 case VXLAN_INPUT_NEXT_IP4_INPUT:
30 return format (s, "ip4");
31 case VXLAN_INPUT_NEXT_IP6_INPUT:
32 return format (s, "ip6");
34 return format (s, "unknown %d", next_index);
39 u8 * format_vxlan_tunnel (u8 * s, va_list * args)
41 vxlan_tunnel_t * t = va_arg (*args, vxlan_tunnel_t *);
42 vxlan_main_t * ngm = &vxlan_main;
45 "[%d] %U (src) %U (dst) vni %d encap_fib_index %d",
47 format_ip4_address, &t->src,
48 format_ip4_address, &t->dst,
51 s = format (s, " decap_next %U\n", format_decap_next, t->decap_next_index);
55 static u8 * format_vxlan_name (u8 * s, va_list * args)
57 u32 dev_instance = va_arg (*args, u32);
58 return format (s, "vxlan_tunnel%d", dev_instance);
61 static uword dummy_interface_tx (vlib_main_t * vm,
62 vlib_node_runtime_t * node,
65 clib_warning ("you shouldn't be here, leaking buffers...");
66 return frame->n_vectors;
70 vxlan_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
72 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
73 vnet_hw_interface_set_flags (vnm, hw_if_index, VNET_HW_INTERFACE_FLAG_LINK_UP);
75 vnet_hw_interface_set_flags (vnm, hw_if_index, 0);
77 return /* no error */ 0;
80 VNET_DEVICE_CLASS (vxlan_device_class,static) = {
82 .format_device_name = format_vxlan_name,
83 .format_tx_trace = format_vxlan_encap_trace,
84 .tx_function = dummy_interface_tx,
85 .admin_up_down_function = vxlan_interface_admin_up_down,
88 static uword dummy_set_rewrite (vnet_main_t * vnm,
93 uword max_rewrite_bytes)
98 static u8 * format_vxlan_header_with_length (u8 * s, va_list * args)
100 u32 dev_instance = va_arg (*args, u32);
101 s = format (s, "unimplemented dev %u", dev_instance);
105 VNET_HW_INTERFACE_CLASS (vxlan_hw_class) = {
107 .format_header = format_vxlan_header_with_length,
108 .set_rewrite = dummy_set_rewrite,
111 #define foreach_copy_field \
118 static int vxlan_rewrite (vxlan_tunnel_t * t)
122 ip4_vxlan_header_t * h0;
123 int len = sizeof (*h0);
125 vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
127 h0 = (ip4_vxlan_header_t *) rw;
129 /* Fixed portion of the (outer) ip4 header */
131 ip0->ip_version_and_header_length = 0x45;
133 ip0->protocol = IP_PROTOCOL_UDP;
135 /* we fix up the ip4 header length and checksum after-the-fact */
136 ip0->src_address.as_u32 = t->src.as_u32;
137 ip0->dst_address.as_u32 = t->dst.as_u32;
138 ip0->checksum = ip4_header_checksum (ip0);
140 /* UDP header, randomize src port on something, maybe? */
141 h0->udp.src_port = clib_host_to_net_u16 (4789);
142 h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan);
145 vnet_set_vni_and_flags(&h0->vxlan, t->vni);
151 int vnet_vxlan_add_del_tunnel
152 (vnet_vxlan_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
154 vxlan_main_t * vxm = &vxlan_main;
155 vxlan_tunnel_t *t = 0;
156 vnet_main_t * vnm = vxm->vnet_main;
157 ip4_main_t * im4 = &ip4_main;
158 vnet_hw_interface_t * hi;
160 u32 hw_if_index = ~0;
161 u32 sw_if_index = ~0;
163 vxlan_tunnel_key_t key;
165 key.src = a->dst.as_u32; /* decap src in key is encap dst in config */
166 key.vni = clib_host_to_net_u32 (a->vni << 8);
168 p = hash_get (vxm->vxlan_tunnel_by_key, key.as_u64);
172 /* adding a tunnel: tunnel must not already exist */
174 return VNET_API_ERROR_TUNNEL_EXIST;
176 if (a->decap_next_index == ~0)
177 a->decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
179 if (a->decap_next_index >= VXLAN_INPUT_N_NEXT)
180 return VNET_API_ERROR_INVALID_DECAP_NEXT;
182 pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES);
183 memset (t, 0, sizeof (*t));
185 /* copy from arg structure */
186 #define _(x) t->x = a->x;
190 rv = vxlan_rewrite (t);
194 pool_put (vxm->tunnels, t);
198 hash_set (vxm->vxlan_tunnel_by_key, key.as_u64, t - vxm->tunnels);
200 if (vec_len (vxm->free_vxlan_tunnel_hw_if_indices) > 0)
202 vnet_interface_main_t * im = &vnm->interface_main;
203 hw_if_index = vxm->free_vxlan_tunnel_hw_if_indices
204 [vec_len (vxm->free_vxlan_tunnel_hw_if_indices)-1];
205 _vec_len (vxm->free_vxlan_tunnel_hw_if_indices) -= 1;
207 hi = vnet_get_hw_interface (vnm, hw_if_index);
208 hi->dev_instance = t - vxm->tunnels;
209 hi->hw_instance = hi->dev_instance;
211 /* clear old stats of freed tunnel before reuse */
212 sw_if_index = hi->sw_if_index;
213 vnet_interface_counter_lock(im);
214 vlib_zero_combined_counter
215 (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX], sw_if_index);
216 vlib_zero_combined_counter
217 (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX], sw_if_index);
218 vlib_zero_simple_counter
219 (&im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP], sw_if_index);
220 vnet_interface_counter_unlock(im);
224 hw_if_index = vnet_register_interface
225 (vnm, vxlan_device_class.index, t - vxm->tunnels,
226 vxlan_hw_class.index, t - vxm->tunnels);
227 hi = vnet_get_hw_interface (vnm, hw_if_index);
228 hi->output_node_index = vxlan_encap_node.index;
231 t->hw_if_index = hw_if_index;
232 t->sw_if_index = sw_if_index = hi->sw_if_index;
234 vec_validate_init_empty (vxm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
235 vxm->tunnel_index_by_sw_if_index[sw_if_index] = t - vxm->tunnels;
237 if (a->decap_next_index == VXLAN_INPUT_NEXT_L2_INPUT)
239 l2input_main_t * l2im = &l2input_main;
240 /* setup l2 input config with l2 feature and bd 0 to drop packet */
241 vec_validate (l2im->configs, sw_if_index);
242 l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP;
243 l2im->configs[sw_if_index].bd_index = 0;
245 vnet_sw_interface_set_flags (vnm, sw_if_index,
246 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
247 vec_validate (im4->fib_index_by_sw_if_index, sw_if_index);
248 im4->fib_index_by_sw_if_index[sw_if_index] = t->encap_fib_index;
252 /* deleting a tunnel: tunnel must exist */
254 return VNET_API_ERROR_NO_SUCH_ENTRY;
256 t = pool_elt_at_index (vxm->tunnels, p[0]);
258 vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */);
259 /* make sure tunnel is removed from l2 bd or xconnect */
260 set_int_l2_mode(vxm->vlib_main, vnm, MODE_L3, t->sw_if_index, 0, 0, 0, 0);
261 vec_add1 (vxm->free_vxlan_tunnel_hw_if_indices, t->hw_if_index);
263 vxm->tunnel_index_by_sw_if_index[t->sw_if_index] = ~0;
265 hash_unset (vxm->vxlan_tunnel_by_key, key.as_u64);
267 vec_free (t->rewrite);
268 t->rewrite = vxlan_dummy_rewrite;
269 pool_put (vxm->tunnels, t);
273 *sw_if_indexp = sw_if_index;
278 static u32 fib_index_from_fib_id (u32 fib_id)
280 ip4_main_t * im = &ip4_main;
283 p = hash_get (im->fib_index_by_table_id, fib_id);
290 static uword unformat_decap_next (unformat_input_t * input, va_list * args)
292 u32 * result = va_arg (*args, u32 *);
295 if (unformat (input, "l2"))
296 *result = VXLAN_INPUT_NEXT_L2_INPUT;
297 else if (unformat (input, "drop"))
298 *result = VXLAN_INPUT_NEXT_DROP;
299 else if (unformat (input, "ip4"))
300 *result = VXLAN_INPUT_NEXT_IP4_INPUT;
301 else if (unformat (input, "ip6"))
302 *result = VXLAN_INPUT_NEXT_IP6_INPUT;
303 else if (unformat (input, "%d", &tmp))
310 static clib_error_t *
311 vxlan_add_del_tunnel_command_fn (vlib_main_t * vm,
312 unformat_input_t * input,
313 vlib_cli_command_t * cmd)
315 unformat_input_t _line_input, * line_input = &_line_input;
316 ip4_address_t src, dst;
320 u32 encap_fib_index = 0;
321 u32 decap_next_index = ~0;
325 vnet_vxlan_add_del_tunnel_args_t _a, * a = &_a;
327 /* Get a line of input. */
328 if (! unformat_user (input, unformat_line_input, line_input))
331 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) {
332 if (unformat (line_input, "del"))
334 else if (unformat (line_input, "src %U",
335 unformat_ip4_address, &src))
337 else if (unformat (line_input, "dst %U",
338 unformat_ip4_address, &dst))
340 else if (unformat (line_input, "encap-vrf-id %d", &tmp))
342 encap_fib_index = fib_index_from_fib_id (tmp);
343 if (encap_fib_index == ~0)
344 return clib_error_return (0, "nonexistent encap-vrf-id %d", tmp);
346 else if (unformat (line_input, "decap-next %U", unformat_decap_next,
349 else if (unformat (line_input, "vni %d", &vni))
352 return clib_error_return (0, "vni %d out of range", vni);
355 return clib_error_return (0, "parse error: '%U'",
356 format_unformat_error, line_input);
359 unformat_free (line_input);
362 return clib_error_return (0, "tunnel src address not specified");
365 return clib_error_return (0, "tunnel dst address not specified");
368 return clib_error_return (0, "vni not specified");
370 memset (a, 0, sizeof (*a));
374 #define _(x) a->x = x;
378 rv = vnet_vxlan_add_del_tunnel (a, 0 /* hw_if_indexp */);
384 case VNET_API_ERROR_INVALID_DECAP_NEXT:
385 return clib_error_return (0, "invalid decap-next...");
387 case VNET_API_ERROR_TUNNEL_EXIST:
388 return clib_error_return (0, "tunnel already exists...");
390 case VNET_API_ERROR_NO_SUCH_ENTRY:
391 return clib_error_return (0, "tunnel does not exist...");
394 return clib_error_return
395 (0, "vnet_vxlan_add_del_tunnel returned %d", rv);
401 VLIB_CLI_COMMAND (create_vxlan_tunnel_command, static) = {
402 .path = "create vxlan tunnel",
404 "create vxlan tunnel src <local-vtep-addr> dst <remote-vtep-addr> vni <nn>"
405 " [encap-vrf-id <nn>] [decap-next [l2|ip4|ip6] [del]\n",
406 .function = vxlan_add_del_tunnel_command_fn,
409 static clib_error_t *
410 show_vxlan_tunnel_command_fn (vlib_main_t * vm,
411 unformat_input_t * input,
412 vlib_cli_command_t * cmd)
414 vxlan_main_t * vxm = &vxlan_main;
417 if (pool_elts (vxm->tunnels) == 0)
418 vlib_cli_output (vm, "No vxlan tunnels configured...");
420 pool_foreach (t, vxm->tunnels,
422 vlib_cli_output (vm, "%U", format_vxlan_tunnel, t);
428 VLIB_CLI_COMMAND (show_vxlan_tunnel_command, static) = {
429 .path = "show vxlan tunnel",
430 .function = show_vxlan_tunnel_command_fn,
433 clib_error_t *vxlan_init (vlib_main_t *vm)
435 vxlan_main_t * vxm = &vxlan_main;
436 ip4_vxlan_header_t * hdr;
439 vxm->vnet_main = vnet_get_main();
442 /* init dummy rewrite string for deleted vxlan tunnels */
443 _vec_len(vxlan_dummy_rewrite) = sizeof(ip4_vxlan_header_t);
444 hdr = (ip4_vxlan_header_t *) vxlan_dummy_rewrite;
446 /* minimal rewrite setup, see vxlan_rewite() above as reference */
447 ip->ip_version_and_header_length = 0x45;
448 ip->checksum = ip4_header_checksum (ip);
450 udp_register_dst_port (vm, UDP_DST_PORT_vxlan,
451 vxlan_input_node.index, 1 /* is_ip4 */);
455 VLIB_INIT_FUNCTION(vxlan_init);