Line data Source code
1 : /*
2 : * Copyright (c) 2017 Intel 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:
6 : *
7 : * http://www.apache.org/licenses/LICENSE-2.0
8 : *
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.
14 : */
15 : #include <vppinfra/error.h>
16 : #include <vppinfra/hash.h>
17 : #include <vnet/vnet.h>
18 : #include <vnet/ip/ip.h>
19 : #include <vnet/ethernet/ethernet.h>
20 : #include <gtpu/gtpu.h>
21 :
22 : /* Statistics (not all errors) */
23 : #define foreach_gtpu_encap_error \
24 : _(ENCAPSULATED, "good packets encapsulated")
25 :
26 : static char * gtpu_encap_error_strings[] = {
27 : #define _(sym,string) string,
28 : foreach_gtpu_encap_error
29 : #undef _
30 : };
31 :
32 : typedef enum {
33 : #define _(sym,str) GTPU_ENCAP_ERROR_##sym,
34 : foreach_gtpu_encap_error
35 : #undef _
36 : GTPU_ENCAP_N_ERROR,
37 : } gtpu_encap_error_t;
38 :
39 : #define foreach_gtpu_encap_next \
40 : _(DROP, "error-drop") \
41 : _(IP4_LOOKUP, "ip4-lookup") \
42 : _(IP6_LOOKUP, "ip6-lookup")
43 :
44 : typedef enum {
45 : GTPU_ENCAP_NEXT_DROP,
46 : GTPU_ENCAP_NEXT_IP4_LOOKUP,
47 : GTPU_ENCAP_NEXT_IP6_LOOKUP,
48 : GTPU_ENCAP_N_NEXT,
49 : } gtpu_encap_next_t;
50 :
51 :
52 : #define foreach_fixed_header4_offset \
53 : _(0) _(1) _(2) _(3)
54 :
55 : #define foreach_fixed_header6_offset \
56 : _(0) _(1) _(2) _(3) _(4) _(5) _(6)
57 :
58 : always_inline uword
59 3 : gtpu_encap_inline (vlib_main_t * vm,
60 : vlib_node_runtime_t * node,
61 : vlib_frame_t * from_frame,
62 : u32 is_ip4)
63 : {
64 : u32 n_left_from, next_index, * from, * to_next;
65 3 : gtpu_main_t * gtm = >pu_main;
66 3 : vnet_main_t * vnm = gtm->vnet_main;
67 3 : vnet_interface_main_t * im = &vnm->interface_main;
68 3 : u32 pkts_encapsulated = 0;
69 3 : u16 old_l0 = 0, old_l1 = 0, old_l2 = 0, old_l3 = 0;
70 3 : u32 thread_index = vlib_get_thread_index();
71 : u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
72 3 : u32 sw_if_index0 = 0, sw_if_index1 = 0, sw_if_index2 = 0, sw_if_index3 = 0;
73 3 : u32 next0 = 0, next1 = 0, next2 = 0, next3 = 0;
74 : vnet_hw_interface_t * hi0, * hi1, * hi2, * hi3;
75 3 : gtpu_tunnel_t * t0 = NULL, * t1 = NULL, * t2 = NULL, * t3 = NULL;
76 :
77 3 : from = vlib_frame_vector_args (from_frame);
78 3 : n_left_from = from_frame->n_vectors;
79 :
80 3 : next_index = node->cached_next_index;
81 3 : stats_sw_if_index = node->runtime_data[0];
82 3 : stats_n_packets = stats_n_bytes = 0;
83 :
84 6 : while (n_left_from > 0)
85 : {
86 : u32 n_left_to_next;
87 :
88 3 : vlib_get_next_frame (vm, node, next_index,
89 : to_next, n_left_to_next);
90 :
91 4 : while (n_left_from >= 8 && n_left_to_next >= 4)
92 : {
93 : u32 bi0, bi1, bi2, bi3;
94 : vlib_buffer_t * b0, * b1, * b2, * b3;
95 : u32 flow_hash0, flow_hash1, flow_hash2, flow_hash3;
96 : u32 len0, len1, len2, len3;
97 : ip4_header_t * ip4_0, * ip4_1, * ip4_2, * ip4_3;
98 : ip6_header_t * ip6_0, * ip6_1, * ip6_2, * ip6_3;
99 : udp_header_t * udp0, * udp1, * udp2, * udp3;
100 : gtpu_header_t * gtpu0, * gtpu1, * gtpu2, * gtpu3;
101 : u64 * copy_src0, * copy_dst0;
102 : u64 * copy_src1, * copy_dst1;
103 : u64 * copy_src2, * copy_dst2;
104 : u64 * copy_src3, * copy_dst3;
105 : u32 * copy_src_last0, * copy_dst_last0;
106 : u32 * copy_src_last1, * copy_dst_last1;
107 : u32 * copy_src_last2, * copy_dst_last2;
108 : u32 * copy_src_last3, * copy_dst_last3;
109 : u16 new_l0, new_l1, new_l2, new_l3;
110 : ip_csum_t sum0, sum1, sum2, sum3;
111 :
112 : /* Prefetch next iteration. */
113 : {
114 : vlib_buffer_t * p4, * p5, * p6, * p7;
115 :
116 1 : p4 = vlib_get_buffer (vm, from[4]);
117 1 : p5 = vlib_get_buffer (vm, from[5]);
118 1 : p6 = vlib_get_buffer (vm, from[6]);
119 1 : p7 = vlib_get_buffer (vm, from[7]);
120 :
121 1 : vlib_prefetch_buffer_header (p4, LOAD);
122 1 : vlib_prefetch_buffer_header (p5, LOAD);
123 1 : vlib_prefetch_buffer_header (p6, LOAD);
124 1 : vlib_prefetch_buffer_header (p7, LOAD);
125 :
126 1 : CLIB_PREFETCH (p4->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
127 1 : CLIB_PREFETCH (p5->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
128 1 : CLIB_PREFETCH (p6->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
129 1 : CLIB_PREFETCH (p7->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
130 : }
131 :
132 1 : bi0 = from[0];
133 1 : bi1 = from[1];
134 1 : bi2 = from[2];
135 1 : bi3 = from[3];
136 1 : to_next[0] = bi0;
137 1 : to_next[1] = bi1;
138 1 : to_next[2] = bi2;
139 1 : to_next[3] = bi3;
140 1 : from += 4;
141 1 : to_next += 4;
142 1 : n_left_to_next -= 4;
143 1 : n_left_from -= 4;
144 :
145 1 : b0 = vlib_get_buffer (vm, bi0);
146 1 : b1 = vlib_get_buffer (vm, bi1);
147 1 : b2 = vlib_get_buffer (vm, bi2);
148 1 : b3 = vlib_get_buffer (vm, bi3);
149 :
150 1 : flow_hash0 = vnet_l2_compute_flow_hash (b0);
151 1 : flow_hash1 = vnet_l2_compute_flow_hash (b1);
152 1 : flow_hash2 = vnet_l2_compute_flow_hash (b2);
153 1 : flow_hash3 = vnet_l2_compute_flow_hash (b3);
154 :
155 : /* Get next node index and adj index from tunnel next_dpo */
156 1 : sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
157 1 : sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
158 1 : sw_if_index2 = vnet_buffer(b2)->sw_if_index[VLIB_TX];
159 1 : sw_if_index3 = vnet_buffer(b3)->sw_if_index[VLIB_TX];
160 1 : hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
161 1 : hi1 = vnet_get_sup_hw_interface (vnm, sw_if_index1);
162 1 : hi2 = vnet_get_sup_hw_interface (vnm, sw_if_index2);
163 1 : hi3 = vnet_get_sup_hw_interface (vnm, sw_if_index3);
164 1 : t0 = >m->tunnels[hi0->dev_instance];
165 1 : t1 = >m->tunnels[hi1->dev_instance];
166 1 : t2 = >m->tunnels[hi2->dev_instance];
167 1 : t3 = >m->tunnels[hi3->dev_instance];
168 :
169 : /* Note: change to always set next0 if it may be set to drop */
170 1 : next0 = t0->next_dpo.dpoi_next_node;
171 1 : vnet_buffer(b0)->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index;
172 1 : next1 = t1->next_dpo.dpoi_next_node;
173 1 : vnet_buffer(b1)->ip.adj_index[VLIB_TX] = t1->next_dpo.dpoi_index;
174 1 : next2 = t2->next_dpo.dpoi_next_node;
175 1 : vnet_buffer(b2)->ip.adj_index[VLIB_TX] = t2->next_dpo.dpoi_index;
176 1 : next3 = t3->next_dpo.dpoi_next_node;
177 1 : vnet_buffer(b3)->ip.adj_index[VLIB_TX] = t3->next_dpo.dpoi_index;
178 :
179 : /* Apply the rewrite string. $$$$ vnet_rewrite? */
180 1 : vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
181 1 : vlib_buffer_advance (b1, -(word)_vec_len(t1->rewrite));
182 1 : vlib_buffer_advance (b2, -(word)_vec_len(t2->rewrite));
183 1 : vlib_buffer_advance (b3, -(word)_vec_len(t3->rewrite));
184 :
185 1 : if (is_ip4)
186 : {
187 1 : ip4_0 = vlib_buffer_get_current(b0);
188 1 : ip4_1 = vlib_buffer_get_current(b1);
189 1 : ip4_2 = vlib_buffer_get_current(b2);
190 1 : ip4_3 = vlib_buffer_get_current(b3);
191 :
192 : /* Copy the fixed header */
193 1 : copy_dst0 = (u64 *) ip4_0;
194 1 : copy_src0 = (u64 *) t0->rewrite;
195 1 : copy_dst1 = (u64 *) ip4_1;
196 1 : copy_src1 = (u64 *) t1->rewrite;
197 1 : copy_dst2 = (u64 *) ip4_2;
198 1 : copy_src2 = (u64 *) t2->rewrite;
199 1 : copy_dst3 = (u64 *) ip4_3;
200 1 : copy_src3 = (u64 *) t3->rewrite;
201 :
202 : /* Copy first 32 octets 8-bytes at a time */
203 : #define _(offs) copy_dst0[offs] = copy_src0[offs];
204 1 : foreach_fixed_header4_offset;
205 : #undef _
206 : #define _(offs) copy_dst1[offs] = copy_src1[offs];
207 1 : foreach_fixed_header4_offset;
208 : #undef _
209 : #define _(offs) copy_dst2[offs] = copy_src2[offs];
210 1 : foreach_fixed_header4_offset;
211 : #undef _
212 : #define _(offs) copy_dst3[offs] = copy_src3[offs];
213 1 : foreach_fixed_header4_offset;
214 : #undef _
215 : /* Last 4 octets. Hopefully gcc will be our friend */
216 1 : copy_dst_last0 = (u32 *)(©_dst0[4]);
217 1 : copy_src_last0 = (u32 *)(©_src0[4]);
218 1 : copy_dst_last0[0] = copy_src_last0[0];
219 1 : copy_dst_last1 = (u32 *)(©_dst1[4]);
220 1 : copy_src_last1 = (u32 *)(©_src1[4]);
221 1 : copy_dst_last1[0] = copy_src_last1[0];
222 1 : copy_dst_last2 = (u32 *)(©_dst2[4]);
223 1 : copy_src_last2 = (u32 *)(©_src2[4]);
224 1 : copy_dst_last2[0] = copy_src_last2[0];
225 1 : copy_dst_last3 = (u32 *)(©_dst3[4]);
226 1 : copy_src_last3 = (u32 *)(©_src3[4]);
227 1 : copy_dst_last3[0] = copy_src_last3[0];
228 :
229 : /* Fix the IP4 checksum and length */
230 1 : sum0 = ip4_0->checksum;
231 : new_l0 = /* old_l0 always 0, see the rewrite setup */
232 1 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
233 1 : sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
234 : length /* changed member */);
235 1 : ip4_0->checksum = ip_csum_fold (sum0);
236 1 : ip4_0->length = new_l0;
237 1 : sum1 = ip4_1->checksum;
238 : new_l1 = /* old_l1 always 0, see the rewrite setup */
239 1 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1));
240 1 : sum1 = ip_csum_update (sum1, old_l1, new_l1, ip4_header_t,
241 : length /* changed member */);
242 1 : ip4_1->checksum = ip_csum_fold (sum1);
243 1 : ip4_1->length = new_l1;
244 1 : sum2 = ip4_2->checksum;
245 : new_l2 = /* old_l0 always 0, see the rewrite setup */
246 1 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b2));
247 1 : sum2 = ip_csum_update (sum2, old_l2, new_l2, ip4_header_t,
248 : length /* changed member */);
249 1 : ip4_2->checksum = ip_csum_fold (sum2);
250 1 : ip4_2->length = new_l2;
251 1 : sum3 = ip4_3->checksum;
252 : new_l3 = /* old_l1 always 0, see the rewrite setup */
253 1 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b3));
254 1 : sum3 = ip_csum_update (sum3, old_l3, new_l3, ip4_header_t,
255 : length /* changed member */);
256 1 : ip4_3->checksum = ip_csum_fold (sum3);
257 1 : ip4_3->length = new_l3;
258 :
259 : /* Fix UDP length and set source port */
260 1 : udp0 = (udp_header_t *)(ip4_0+1);
261 1 : new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
262 1 : - sizeof (*ip4_0));
263 1 : udp0->length = new_l0;
264 1 : udp0->src_port = flow_hash0;
265 1 : udp1 = (udp_header_t *)(ip4_1+1);
266 1 : new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b1)
267 1 : - sizeof (*ip4_1));
268 1 : udp1->length = new_l1;
269 1 : udp1->src_port = flow_hash1;
270 1 : udp2 = (udp_header_t *)(ip4_2+1);
271 1 : new_l2 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b2)
272 1 : - sizeof (*ip4_2));
273 1 : udp2->length = new_l2;
274 1 : udp2->src_port = flow_hash2;
275 1 : udp3 = (udp_header_t *)(ip4_3+1);
276 1 : new_l3 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b3)
277 1 : - sizeof (*ip4_3));
278 1 : udp3->length = new_l3;
279 1 : udp3->src_port = flow_hash3;
280 :
281 : /* Fix GTPU length */
282 1 : gtpu0 = (gtpu_header_t *)(udp0+1);
283 1 : new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
284 : - sizeof (*ip4_0) - sizeof(*udp0)
285 1 : - GTPU_V1_HDR_LEN);
286 1 : gtpu0->length = new_l0;
287 1 : gtpu1 = (gtpu_header_t *)(udp1+1);
288 1 : new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b1)
289 : - sizeof (*ip4_1) - sizeof(*udp1)
290 1 : - GTPU_V1_HDR_LEN);
291 1 : gtpu1->length = new_l1;
292 1 : gtpu2 = (gtpu_header_t *)(udp2+1);
293 1 : new_l2 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b2)
294 : - sizeof (*ip4_2) - sizeof(*udp2)
295 1 : - GTPU_V1_HDR_LEN);
296 1 : gtpu2->length = new_l2;
297 1 : gtpu3 = (gtpu_header_t *)(udp3+1);
298 1 : new_l3 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b3)
299 : - sizeof (*ip4_3) - sizeof(*udp3)
300 1 : - GTPU_V1_HDR_LEN);
301 1 : gtpu3->length = new_l3;
302 : }
303 : else /* ipv6 */
304 : {
305 0 : int bogus = 0;
306 :
307 0 : ip6_0 = vlib_buffer_get_current(b0);
308 0 : ip6_1 = vlib_buffer_get_current(b1);
309 0 : ip6_2 = vlib_buffer_get_current(b2);
310 0 : ip6_3 = vlib_buffer_get_current(b3);
311 :
312 : /* Copy the fixed header */
313 0 : copy_dst0 = (u64 *) ip6_0;
314 0 : copy_src0 = (u64 *) t0->rewrite;
315 0 : copy_dst1 = (u64 *) ip6_1;
316 0 : copy_src1 = (u64 *) t1->rewrite;
317 0 : copy_dst2 = (u64 *) ip6_2;
318 0 : copy_src2 = (u64 *) t2->rewrite;
319 0 : copy_dst3 = (u64 *) ip6_3;
320 0 : copy_src3 = (u64 *) t3->rewrite;
321 : /* Copy first 56 (ip6) octets 8-bytes at a time */
322 : #define _(offs) copy_dst0[offs] = copy_src0[offs];
323 0 : foreach_fixed_header6_offset;
324 : #undef _
325 : #define _(offs) copy_dst1[offs] = copy_src1[offs];
326 0 : foreach_fixed_header6_offset;
327 : #undef _
328 : #define _(offs) copy_dst2[offs] = copy_src2[offs];
329 0 : foreach_fixed_header6_offset;
330 : #undef _
331 : #define _(offs) copy_dst3[offs] = copy_src3[offs];
332 0 : foreach_fixed_header6_offset;
333 : #undef _
334 : /* Fix IP6 payload length */
335 : new_l0 =
336 0 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
337 0 : - sizeof(*ip6_0));
338 0 : ip6_0->payload_length = new_l0;
339 : new_l1 =
340 0 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1)
341 0 : - sizeof(*ip6_1));
342 0 : ip6_1->payload_length = new_l1;
343 : new_l2 =
344 0 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b2)
345 0 : - sizeof(*ip6_2));
346 0 : ip6_2->payload_length = new_l2;
347 : new_l3 =
348 0 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b3)
349 0 : - sizeof(*ip6_3));
350 0 : ip6_3->payload_length = new_l3;
351 :
352 : /* Fix UDP length and set source port */
353 0 : udp0 = (udp_header_t *)(ip6_0+1);
354 0 : udp0->length = new_l0;
355 0 : udp0->src_port = flow_hash0;
356 0 : udp1 = (udp_header_t *)(ip6_1+1);
357 0 : udp1->length = new_l1;
358 0 : udp1->src_port = flow_hash1;
359 0 : udp2 = (udp_header_t *)(ip6_2+1);
360 0 : udp2->length = new_l2;
361 0 : udp2->src_port = flow_hash2;
362 0 : udp3 = (udp_header_t *)(ip6_3+1);
363 0 : udp3->length = new_l3;
364 0 : udp3->src_port = flow_hash3;
365 :
366 : /* Fix GTPU length */
367 0 : gtpu0 = (gtpu_header_t *)(udp0+1);
368 0 : new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
369 : - sizeof (*ip6_0) - sizeof(*udp0)
370 0 : - GTPU_V1_HDR_LEN);
371 0 : gtpu0->length = new_l0;
372 0 : gtpu1 = (gtpu_header_t *)(udp1+1);
373 0 : new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b1)
374 : - sizeof (*ip6_1) - sizeof(*udp1)
375 0 : - GTPU_V1_HDR_LEN);
376 0 : gtpu1->length = new_l1;
377 0 : gtpu2 = (gtpu_header_t *)(udp2+1);
378 0 : new_l2 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b2)
379 : - sizeof (*ip6_2) - sizeof(*udp2)
380 0 : - GTPU_V1_HDR_LEN);
381 0 : gtpu2->length = new_l2;
382 0 : gtpu3 = (gtpu_header_t *)(udp3+1);
383 0 : new_l3 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b3)
384 : - sizeof (*ip6_3) - sizeof(*udp3)
385 0 : - GTPU_V1_HDR_LEN);
386 0 : gtpu3->length = new_l3;
387 :
388 : /* IPv6 UDP checksum is mandatory */
389 0 : udp0->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0,
390 : ip6_0, &bogus);
391 0 : if (udp0->checksum == 0)
392 0 : udp0->checksum = 0xffff;
393 0 : udp1->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b1,
394 : ip6_1, &bogus);
395 0 : if (udp1->checksum == 0)
396 0 : udp1->checksum = 0xffff;
397 0 : udp2->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b2,
398 : ip6_2, &bogus);
399 0 : if (udp2->checksum == 0)
400 0 : udp2->checksum = 0xffff;
401 0 : udp3->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b3,
402 : ip6_3, &bogus);
403 0 : if (udp3->checksum == 0)
404 0 : udp3->checksum = 0xffff;
405 :
406 : }
407 :
408 1 : pkts_encapsulated += 4;
409 1 : len0 = vlib_buffer_length_in_chain (vm, b0);
410 1 : len1 = vlib_buffer_length_in_chain (vm, b1);
411 1 : len2 = vlib_buffer_length_in_chain (vm, b2);
412 1 : len3 = vlib_buffer_length_in_chain (vm, b3);
413 1 : stats_n_packets += 4;
414 1 : stats_n_bytes += len0 + len1 + len2 + len3;
415 :
416 : /* save inner packet flow_hash for load-balance node */
417 1 : vnet_buffer (b0)->ip.flow_hash = flow_hash0;
418 1 : vnet_buffer (b1)->ip.flow_hash = flow_hash1;
419 1 : vnet_buffer (b2)->ip.flow_hash = flow_hash2;
420 1 : vnet_buffer (b3)->ip.flow_hash = flow_hash3;
421 :
422 : /* Batch stats increment on the same gtpu tunnel so counter is not
423 : incremented per packet. Note stats are still incremented for deleted
424 : and admin-down tunnel where packets are dropped. It is not worthwhile
425 : to check for this rare case and affect normal path performance. */
426 1 : if (PREDICT_FALSE ((sw_if_index0 != stats_sw_if_index) ||
427 : (sw_if_index1 != stats_sw_if_index) ||
428 : (sw_if_index2 != stats_sw_if_index) ||
429 : (sw_if_index3 != stats_sw_if_index) ))
430 : {
431 1 : stats_n_packets -= 4;
432 1 : stats_n_bytes -= len0 + len1 + len2 + len3;
433 1 : if ( (sw_if_index0 == sw_if_index1 ) &&
434 0 : (sw_if_index1 == sw_if_index2 ) &&
435 : (sw_if_index2 == sw_if_index3 ) )
436 : {
437 0 : if (stats_n_packets)
438 0 : vlib_increment_combined_counter
439 0 : (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
440 : thread_index, stats_sw_if_index,
441 : stats_n_packets, stats_n_bytes);
442 0 : stats_sw_if_index = sw_if_index0;
443 0 : stats_n_packets = 4;
444 0 : stats_n_bytes = len0 + len1 + len2 + len3;
445 : }
446 : else
447 : {
448 1 : vlib_increment_combined_counter
449 1 : (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
450 : thread_index, sw_if_index0, 1, len0);
451 1 : vlib_increment_combined_counter
452 1 : (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
453 : thread_index, sw_if_index1, 1, len1);
454 1 : vlib_increment_combined_counter
455 1 : (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
456 : thread_index, sw_if_index2, 1, len2);
457 1 : vlib_increment_combined_counter
458 1 : (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
459 : thread_index, sw_if_index3, 1, len3);
460 : }
461 : }
462 :
463 1 : if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
464 : {
465 : gtpu_encap_trace_t *tr =
466 1 : vlib_add_trace (vm, node, b0, sizeof (*tr));
467 1 : tr->tunnel_index = t0 - gtm->tunnels;
468 1 : tr->tteid = t0->tteid;
469 : }
470 :
471 1 : if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
472 : {
473 : gtpu_encap_trace_t *tr =
474 1 : vlib_add_trace (vm, node, b1, sizeof (*tr));
475 1 : tr->tunnel_index = t1 - gtm->tunnels;
476 1 : tr->tteid = t1->tteid;
477 : }
478 :
479 1 : if (PREDICT_FALSE(b2->flags & VLIB_BUFFER_IS_TRACED))
480 : {
481 : gtpu_encap_trace_t *tr =
482 1 : vlib_add_trace (vm, node, b2, sizeof (*tr));
483 1 : tr->tunnel_index = t2 - gtm->tunnels;
484 1 : tr->tteid = t2->tteid;
485 : }
486 :
487 1 : if (PREDICT_FALSE(b3->flags & VLIB_BUFFER_IS_TRACED))
488 : {
489 : gtpu_encap_trace_t *tr =
490 1 : vlib_add_trace (vm, node, b3, sizeof (*tr));
491 1 : tr->tunnel_index = t3 - gtm->tunnels;
492 1 : tr->tteid = t3->tteid;
493 : }
494 :
495 1 : vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
496 : to_next, n_left_to_next,
497 : bi0, bi1, bi2, bi3,
498 : next0, next1, next2, next3);
499 : }
500 :
501 11 : while (n_left_from > 0 && n_left_to_next > 0)
502 : {
503 : u32 bi0;
504 : vlib_buffer_t * b0;
505 : u32 flow_hash0;
506 : u32 len0;
507 : ip4_header_t * ip4_0;
508 : ip6_header_t * ip6_0;
509 : udp_header_t * udp0;
510 : gtpu_header_t * gtpu0;
511 : u64 * copy_src0, * copy_dst0;
512 : u32 * copy_src_last0, * copy_dst_last0;
513 : u16 new_l0;
514 : ip_csum_t sum0;
515 :
516 8 : bi0 = from[0];
517 8 : to_next[0] = bi0;
518 8 : from += 1;
519 8 : to_next += 1;
520 8 : n_left_from -= 1;
521 8 : n_left_to_next -= 1;
522 :
523 8 : b0 = vlib_get_buffer (vm, bi0);
524 :
525 8 : flow_hash0 = vnet_l2_compute_flow_hash(b0);
526 :
527 : /* Get next node index and adj index from tunnel next_dpo */
528 8 : sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
529 8 : hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
530 8 : t0 = >m->tunnels[hi0->dev_instance];
531 : /* Note: change to always set next0 if it may be set to drop */
532 8 : next0 = t0->next_dpo.dpoi_next_node;
533 8 : vnet_buffer(b0)->ip.adj_index[VLIB_TX] = t0->next_dpo.dpoi_index;
534 :
535 : /* Apply the rewrite string. $$$$ vnet_rewrite? */
536 8 : vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
537 :
538 8 : if (is_ip4)
539 : {
540 8 : ip4_0 = vlib_buffer_get_current(b0);
541 :
542 : /* Copy the fixed header */
543 8 : copy_dst0 = (u64 *) ip4_0;
544 8 : copy_src0 = (u64 *) t0->rewrite;
545 : /* Copy first 32 octets 8-bytes at a time */
546 : #define _(offs) copy_dst0[offs] = copy_src0[offs];
547 8 : foreach_fixed_header4_offset;
548 : #undef _
549 : /* Last 4 octets. Hopefully gcc will be our friend */
550 8 : copy_dst_last0 = (u32 *)(©_dst0[4]);
551 8 : copy_src_last0 = (u32 *)(©_src0[4]);
552 8 : copy_dst_last0[0] = copy_src_last0[0];
553 :
554 : /* Fix the IP4 checksum and length */
555 8 : sum0 = ip4_0->checksum;
556 : new_l0 = /* old_l0 always 0, see the rewrite setup */
557 8 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
558 8 : sum0 = ip_csum_update (sum0, old_l0, new_l0, ip4_header_t,
559 : length /* changed member */);
560 8 : ip4_0->checksum = ip_csum_fold (sum0);
561 8 : ip4_0->length = new_l0;
562 :
563 : /* Fix UDP length and set source port */
564 8 : udp0 = (udp_header_t *)(ip4_0+1);
565 8 : new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
566 8 : - sizeof (*ip4_0));
567 8 : udp0->length = new_l0;
568 8 : udp0->src_port = flow_hash0;
569 :
570 : /* Fix GTPU length */
571 8 : gtpu0 = (gtpu_header_t *)(udp0+1);
572 8 : new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
573 : - sizeof (*ip4_0) - sizeof(*udp0)
574 8 : - GTPU_V1_HDR_LEN);
575 8 : gtpu0->length = new_l0;
576 : }
577 :
578 : else /* ip6 path */
579 : {
580 0 : int bogus = 0;
581 :
582 0 : ip6_0 = vlib_buffer_get_current(b0);
583 : /* Copy the fixed header */
584 0 : copy_dst0 = (u64 *) ip6_0;
585 0 : copy_src0 = (u64 *) t0->rewrite;
586 : /* Copy first 56 (ip6) octets 8-bytes at a time */
587 : #define _(offs) copy_dst0[offs] = copy_src0[offs];
588 0 : foreach_fixed_header6_offset;
589 : #undef _
590 : /* Fix IP6 payload length */
591 : new_l0 =
592 0 : clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)
593 0 : - sizeof(*ip6_0));
594 0 : ip6_0->payload_length = new_l0;
595 :
596 : /* Fix UDP length and set source port */
597 0 : udp0 = (udp_header_t *)(ip6_0+1);
598 0 : udp0->length = new_l0;
599 0 : udp0->src_port = flow_hash0;
600 :
601 : /* Fix GTPU length */
602 0 : gtpu0 = (gtpu_header_t *)(udp0+1);
603 0 : new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
604 : - sizeof (*ip4_0) - sizeof(*udp0)
605 0 : - GTPU_V1_HDR_LEN);
606 0 : gtpu0->length = new_l0;
607 :
608 : /* IPv6 UDP checksum is mandatory */
609 0 : udp0->checksum = ip6_tcp_udp_icmp_compute_checksum(vm, b0,
610 : ip6_0, &bogus);
611 0 : if (udp0->checksum == 0)
612 0 : udp0->checksum = 0xffff;
613 : }
614 :
615 8 : pkts_encapsulated ++;
616 8 : len0 = vlib_buffer_length_in_chain (vm, b0);
617 8 : stats_n_packets += 1;
618 8 : stats_n_bytes += len0;
619 :
620 : /* save inner packet flow_hash for load-balance node */
621 8 : vnet_buffer (b0)->ip.flow_hash = flow_hash0;
622 :
623 : /* Batch stats increment on the same gtpu tunnel so counter is not
624 : incremented per packet. Note stats are still incremented for deleted
625 : and admin-down tunnel where packets are dropped. It is not worthwhile
626 : to check for this rare case and affect normal path performance. */
627 8 : if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
628 : {
629 8 : stats_n_packets -= 1;
630 8 : stats_n_bytes -= len0;
631 8 : if (stats_n_packets)
632 5 : vlib_increment_combined_counter
633 5 : (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
634 : thread_index, stats_sw_if_index,
635 : stats_n_packets, stats_n_bytes);
636 8 : stats_n_packets = 1;
637 8 : stats_n_bytes = len0;
638 8 : stats_sw_if_index = sw_if_index0;
639 : }
640 :
641 8 : if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
642 : {
643 : gtpu_encap_trace_t *tr =
644 8 : vlib_add_trace (vm, node, b0, sizeof (*tr));
645 8 : tr->tunnel_index = t0 - gtm->tunnels;
646 8 : tr->tteid = t0->tteid;
647 : }
648 8 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
649 : to_next, n_left_to_next,
650 : bi0, next0);
651 : }
652 :
653 3 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
654 : }
655 :
656 : /* Do we still need this now that tunnel tx stats is kept? */
657 3 : vlib_node_increment_counter (vm, node->node_index,
658 : GTPU_ENCAP_ERROR_ENCAPSULATED,
659 : pkts_encapsulated);
660 :
661 : /* Increment any remaining batch stats */
662 3 : if (stats_n_packets)
663 : {
664 3 : vlib_increment_combined_counter
665 3 : (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
666 : thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
667 3 : node->runtime_data[0] = stats_sw_if_index;
668 : }
669 :
670 3 : return from_frame->n_vectors;
671 : }
672 :
673 2239 : VLIB_NODE_FN (gtpu4_encap_node) (vlib_main_t * vm,
674 : vlib_node_runtime_t * node,
675 : vlib_frame_t * from_frame)
676 : {
677 3 : return gtpu_encap_inline (vm, node, from_frame, /* is_ip4 */ 1);
678 : }
679 :
680 2236 : VLIB_NODE_FN (gtpu6_encap_node) (vlib_main_t * vm,
681 : vlib_node_runtime_t * node,
682 : vlib_frame_t * from_frame)
683 : {
684 0 : return gtpu_encap_inline (vm, node, from_frame, /* is_ip4 */ 0);
685 : }
686 :
687 129960 : VLIB_REGISTER_NODE (gtpu4_encap_node) = {
688 : .name = "gtpu4-encap",
689 : .vector_size = sizeof (u32),
690 : .format_trace = format_gtpu_encap_trace,
691 : .type = VLIB_NODE_TYPE_INTERNAL,
692 : .n_errors = ARRAY_LEN(gtpu_encap_error_strings),
693 : .error_strings = gtpu_encap_error_strings,
694 : .n_next_nodes = GTPU_ENCAP_N_NEXT,
695 : .next_nodes = {
696 : #define _(s,n) [GTPU_ENCAP_NEXT_##s] = n,
697 : foreach_gtpu_encap_next
698 : #undef _
699 : },
700 : };
701 :
702 129960 : VLIB_REGISTER_NODE (gtpu6_encap_node) = {
703 : .name = "gtpu6-encap",
704 : .vector_size = sizeof (u32),
705 : .format_trace = format_gtpu_encap_trace,
706 : .type = VLIB_NODE_TYPE_INTERNAL,
707 : .n_errors = ARRAY_LEN(gtpu_encap_error_strings),
708 : .error_strings = gtpu_encap_error_strings,
709 : .n_next_nodes = GTPU_ENCAP_N_NEXT,
710 : .next_nodes = {
711 : #define _(s,n) [GTPU_ENCAP_NEXT_##s] = n,
712 : foreach_gtpu_encap_next
713 : #undef _
714 : },
715 : };
716 :
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