2 * Copyright (c) 2017 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.
18 #include <vnet/plugin/plugin.h>
19 #include <vpp/app/version.h>
20 #include <vnet/ip/format.h>
21 #include <vnet/ethernet/packet.h>
22 #include <vnet/udp/udp.h>
23 #include <vnet/tcp/tcp.h>
26 static vlib_node_registration_t stn_ip4_punt;
27 static vlib_node_registration_t stn_ip6_punt;
29 static u8 stn_hw_addr_local[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
30 static u8 stn_hw_addr_dst[6] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x02};
32 static ethernet_header_t stn_ip4_ethernet_header = {};
33 static ethernet_header_t stn_ip6_ethernet_header = {};
36 clib_bihash_kv_16_8_t kv;
37 } stn_ip46_punt_trace_t;
40 format_stn_rule (u8 * s, va_list * args)
42 stn_rule_t *r = va_arg (*args, stn_rule_t *);
43 stn_main_t *stn = &stn_main;
44 u32 indent = format_get_indent (s);
45 u32 node_index = ip46_address_is_ip4(&r->address)?stn_ip4_punt.index:stn_ip6_punt.index;
46 vlib_node_t *next_node = vlib_get_next_node(vlib_get_main(), node_index, r->next_node_index);
47 s = format (s, "rule_index: %d\n", r - stn->rules);
48 s = format (s, "%Uaddress: %U\n", format_white_space, indent,
49 format_ip46_address, &r->address, IP46_TYPE_ANY);
50 s = format (s, "%Uiface: %U (%d)\n", format_white_space, indent,
51 format_vnet_sw_if_index_name, vnet_get_main(), r->sw_if_index,
53 s = format (s, "%Unext_node: %s (%d)", format_white_space, indent,
54 next_node->name, next_node->index);
58 static_always_inline u8 *
59 format_stn_ip46_punt_trace (u8 * s, va_list * args, u8 is_ipv4)
61 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
62 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
63 stn_ip46_punt_trace_t *t = va_arg (*args, stn_ip46_punt_trace_t *);
64 u32 indent = format_get_indent (s);
66 format (s, "dst_address: %U\n", format_ip46_address,
67 (ip46_address_t *)&t->kv.key, IP46_TYPE_ANY);
69 if (t->kv.value == ~(0L))
71 s = format (s, "%Urule: none", format_white_space, indent);
75 s = format (s, "%Urule:\n%U%U", format_white_space, indent,
76 format_white_space, indent + 2,
77 format_stn_rule, &stn_main.rules[t->kv.value]);
83 stn_punt_fn (vlib_main_t * vm,
84 vlib_node_runtime_t * node, vlib_frame_t * frame)
86 u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
87 stn_main_t *stn = &stn_main;
89 from = vlib_frame_vector_args (frame);
90 n_left_from = frame->n_vectors;
91 next_index = node->cached_next_index;
93 while (n_left_from > 0)
95 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
98 while (n_left_from > 0 && n_left_to_next > 0)
104 pi0 = to_next[0] = from[0];
110 p0 = vlib_get_buffer (vm, pi0);
112 ip4_header_t *ip = vlib_buffer_get_current(p0);
113 if ((ip->ip_version_and_header_length & 0xf0) == 0x40)
114 next0 = stn->punt_to_stn_ip4_next_index;
116 next0 = stn->punt_to_stn_ip6_next_index;
118 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
119 n_left_to_next, pi0, next0);
121 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
129 } stn_ip_punt_next_t;
131 static_always_inline uword
132 stn_ip46_punt_fn (vlib_main_t * vm,
133 vlib_node_runtime_t * node, vlib_frame_t * frame,
136 u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
137 stn_main_t *stn = &stn_main;
139 from = vlib_frame_vector_args (frame);
140 n_left_from = frame->n_vectors;
141 next_index = node->cached_next_index;
143 while (n_left_from > 0)
145 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
148 while (n_left_from > 0 && n_left_to_next > 0)
152 clib_bihash_kv_16_8_t kv;
153 u32 next0 = STN_IP_PUNT_DROP;
155 pi0 = to_next[0] = from[0];
161 p0 = vlib_get_buffer (vm, pi0);
165 ip4_header_t *hdr = (ip4_header_t *) vlib_buffer_get_current(p0);
166 ip46_address_set_ip4((ip46_address_t *)kv.key, &hdr->dst_address);
170 ip6_header_t *hdr = (ip6_header_t *) vlib_buffer_get_current(p0);
171 kv.key[0] = hdr->dst_address.as_u64[0];
172 kv.key[1] = hdr->dst_address.as_u64[1];
176 clib_bihash_search_inline_16_8 (&stn->rule_by_address_table, &kv);
177 if (kv.value != ~(0L))
179 ethernet_header_t *eth;
180 stn_rule_t *r = &stn->rules[kv.value];
181 vnet_buffer(p0)->sw_if_index[VLIB_TX] = r->sw_if_index;
182 next0 = r->next_node_index;
183 vlib_buffer_advance(p0, -sizeof(*eth));
184 eth = (ethernet_header_t *) vlib_buffer_get_current(p0);
186 clib_memcpy(eth, &stn_ip4_ethernet_header, sizeof(*eth));
188 clib_memcpy(eth, &stn_ip6_ethernet_header, sizeof(*eth));
191 if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
193 stn_ip46_punt_trace_t *tr =
194 vlib_add_trace (vm, node, p0, sizeof (*tr));
198 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
199 n_left_to_next, pi0, next0);
201 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
204 return frame->n_vectors;
208 #define foreach_stn_ip_punt_error \
212 #define _(sym,str) STN_IP_punt_ERROR_##sym,
213 foreach_stn_ip_punt_error
218 static char *stn_ip_punt_error_strings[] = {
219 #define _(sym,string) string,
220 foreach_stn_ip_punt_error
225 format_stn_ip6_punt_trace (u8 * s, va_list * args)
227 return format_stn_ip46_punt_trace (s, args, 0);
231 stn_ip6_punt_fn (vlib_main_t * vm,
232 vlib_node_runtime_t * node, vlib_frame_t * frame)
234 return stn_ip46_punt_fn(vm, node, frame, 0);
238 VLIB_REGISTER_NODE (stn_ip6_punt, static) =
240 .function = stn_ip6_punt_fn,
241 .name = "stn-ip6-punt",
242 .vector_size = sizeof (u32),
243 .format_trace = format_stn_ip6_punt_trace,
244 .n_errors = STN_IP_PUNT_N_ERROR,
245 .error_strings = stn_ip_punt_error_strings,
246 .n_next_nodes = STN_IP_PUNT_N_NEXT,
249 [STN_IP_PUNT_DROP] = "error-drop"
255 format_stn_ip4_punt_trace (u8 * s, va_list * args)
257 return format_stn_ip46_punt_trace (s, args, 1);
261 stn_ip4_punt_fn (vlib_main_t * vm,
262 vlib_node_runtime_t * node, vlib_frame_t * frame)
264 return stn_ip46_punt_fn(vm, node, frame, 1);
268 VLIB_REGISTER_NODE (stn_ip4_punt, static) =
270 .function = stn_ip4_punt_fn,
271 .name = "stn-ip4-punt",
272 .vector_size = sizeof (u32),
273 .format_trace = format_stn_ip4_punt_trace,
274 .n_errors = STN_IP_PUNT_N_ERROR,
275 .error_strings = stn_ip_punt_error_strings,
276 .n_next_nodes = STN_IP_PUNT_N_NEXT,
279 [STN_IP_PUNT_DROP] = "error-drop",
285 stn_init (vlib_main_t * vm)
287 stn_main_t *stn = &stn_main;
289 clib_bihash_init_16_8(&stn->rule_by_address_table, "stn addresses",
292 clib_memcpy(stn_ip4_ethernet_header.dst_address, stn_hw_addr_dst, 6);
293 clib_memcpy(stn_ip4_ethernet_header.src_address, stn_hw_addr_local, 6);
294 stn_ip4_ethernet_header.type = clib_host_to_net_u16(ETHERNET_TYPE_IP4);
296 clib_memcpy(stn_ip6_ethernet_header.dst_address, stn_hw_addr_dst, 6);
297 clib_memcpy(stn_ip6_ethernet_header.src_address, stn_hw_addr_local, 6);
298 stn_ip6_ethernet_header.type = clib_host_to_net_u16(ETHERNET_TYPE_IP6);
300 u32 punt_node_index = vlib_get_node_by_name(vm, (u8 *)"error-punt")->index;
301 stn->punt_to_stn_ip4_next_index =
302 vlib_node_add_next(vm, punt_node_index, stn_ip4_punt.index);
303 stn->punt_to_stn_ip6_next_index =
304 vlib_node_add_next(vm, punt_node_index, stn_ip6_punt.index);
306 return stn_api_init (vm, stn);
311 VLIB_INIT_FUNCTION (stn_init);
314 VLIB_PLUGIN_REGISTER () = {
315 .version = VPP_BUILD_VER,
316 .description = "VPP Steals the NIC for Container integration",
320 int stn_rule_add_del (stn_rule_add_del_args_t *args)
322 vnet_main_t *vnm = vnet_get_main();
323 vlib_main_t *vm = vlib_get_main();
324 stn_main_t *stn = &stn_main;
326 stn_rule_t *r = NULL;
327 clib_bihash_kv_16_8_t kv;
328 kv.key[0] = args->address.as_u64[0];
329 kv.key[1] = args->address.as_u64[1];
331 if (clib_bihash_search_inline_16_8 (&stn->rule_by_address_table, &kv) == 0)
333 r = &stn->rules[kv.value];
337 pool_get(stn->rules, r);
338 kv.value = r - stn->rules;
339 clib_bihash_add_del_16_8(&stn->rule_by_address_table, &kv, 1);
340 r->address = args->address;
343 if (stn->n_rules == 1)
346 this_vlib_main->os_punt_frame = stn_punt_fn;
348 udp_punt_unknown(vm, 0, 1);
349 udp_punt_unknown(vm, 1, 1);
350 tcp_punt_unknown(vm, 0, 1);
351 tcp_punt_unknown(vm, 1, 1);
357 /* Getting output node and adding it as next */
358 u32 output_node_index =
359 vnet_tx_node_index_for_sw_interface(vnm, args->sw_if_index);
360 u32 node_index = ip46_address_is_ip4(&args->address)?
361 stn_ip4_punt.index : stn_ip6_punt.index;
363 r->sw_if_index = args->sw_if_index;
365 vlib_node_add_next(vm, node_index, output_node_index);
367 /* enabling forwarding on the output node (might not be done since
368 * it is unnumbered) */
369 vnet_feature_enable_disable("ip4-unicast", "ip4-lookup", args->sw_if_index,
371 vnet_feature_enable_disable("ip6-unicast", "ip6-lookup", args->sw_if_index,
373 vnet_feature_enable_disable("ip4-unicast", "ip4-drop", args->sw_if_index,
375 vnet_feature_enable_disable("ip6-unicast", "ip6-drop", args->sw_if_index,
380 clib_bihash_add_del_16_8(&stn->rule_by_address_table, &kv, 0);
381 pool_put(stn->rules, r);
384 if (stn->n_rules == 0)
387 this_vlib_main->os_punt_frame = NULL;
393 return VNET_API_ERROR_NO_SUCH_ENTRY;
399 static clib_error_t *
400 show_stn_rules_fn (vlib_main_t * vm,
401 unformat_input_t * input, vlib_cli_command_t * cmd)
403 stn_main_t *stn = &stn_main;
406 pool_foreach(rule, stn->rules, {
407 s = format (s, "- %U\n", format_stn_rule, rule);
410 vlib_cli_output(vm, "%v", s);
416 VLIB_CLI_COMMAND (show_stn_rules_command, static) =
418 .path = "show stn rules",
420 .function = show_stn_rules_fn,
423 static clib_error_t *
424 stn_rule_fn (vlib_main_t * vm,
425 unformat_input_t * input, vlib_cli_command_t * cmd)
427 unformat_input_t _line_input, *line_input = &_line_input;
428 clib_error_t *error = 0;
429 stn_rule_add_del_args_t args = {};
434 if (!unformat_user (input, unformat_line_input, line_input))
437 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
439 if (unformat (line_input, "address %U", unformat_ip46_address,
440 &args.address, IP46_TYPE_ANY))
443 (line_input, "interface %U", unformat_vnet_sw_interface,
444 vnet_get_main(), &args.sw_if_index))
446 else if (unformat (line_input, "del"))
450 error = clib_error_return (0, "parse error: '%U'",
451 format_unformat_error, line_input);
458 error = clib_error_return (0, "Missing address");
464 error = clib_error_return (0, "Missing interface");
468 if ((ret = stn_rule_add_del (&args)))
470 error = clib_error_return (0, "stn_rule_add_del returned error %d", ret);
475 unformat_free (line_input);
479 VLIB_CLI_COMMAND (stn_rule_command, static) =
482 .short_help = "address <addr> interface <iface> [del]",
483 .function = stn_rule_fn,