1 | /* |
2 | * QEMU RX packets abstractions |
3 | * |
4 | * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com) |
5 | * |
6 | * Developed by Daynix Computing LTD (http://www.daynix.com) |
7 | * |
8 | * Authors: |
9 | * Dmitry Fleytman <dmitry@daynix.com> |
10 | * Tamir Shomer <tamirs@daynix.com> |
11 | * Yan Vugenfirer <yan@daynix.com> |
12 | * |
13 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
14 | * See the COPYING file in the top-level directory. |
15 | * |
16 | */ |
17 | |
18 | #include "qemu/osdep.h" |
19 | #include "trace.h" |
20 | #include "net_rx_pkt.h" |
21 | #include "net/checksum.h" |
22 | #include "net/tap.h" |
23 | |
24 | struct NetRxPkt { |
25 | struct virtio_net_hdr virt_hdr; |
26 | uint8_t ehdr_buf[sizeof(struct eth_header) + sizeof(struct vlan_header)]; |
27 | struct iovec *vec; |
28 | uint16_t vec_len_total; |
29 | uint16_t vec_len; |
30 | uint32_t tot_len; |
31 | uint16_t tci; |
32 | size_t ehdr_buf_len; |
33 | bool has_virt_hdr; |
34 | eth_pkt_types_e packet_type; |
35 | |
36 | /* Analysis results */ |
37 | bool isip4; |
38 | bool isip6; |
39 | bool isudp; |
40 | bool istcp; |
41 | |
42 | size_t l3hdr_off; |
43 | size_t l4hdr_off; |
44 | size_t l5hdr_off; |
45 | |
46 | eth_ip6_hdr_info ip6hdr_info; |
47 | eth_ip4_hdr_info ip4hdr_info; |
48 | eth_l4_hdr_info l4hdr_info; |
49 | }; |
50 | |
51 | void net_rx_pkt_init(struct NetRxPkt **pkt, bool has_virt_hdr) |
52 | { |
53 | struct NetRxPkt *p = g_malloc0(sizeof *p); |
54 | p->has_virt_hdr = has_virt_hdr; |
55 | p->vec = NULL; |
56 | p->vec_len_total = 0; |
57 | *pkt = p; |
58 | } |
59 | |
60 | void net_rx_pkt_uninit(struct NetRxPkt *pkt) |
61 | { |
62 | if (pkt->vec_len_total != 0) { |
63 | g_free(pkt->vec); |
64 | } |
65 | |
66 | g_free(pkt); |
67 | } |
68 | |
69 | struct virtio_net_hdr *net_rx_pkt_get_vhdr(struct NetRxPkt *pkt) |
70 | { |
71 | assert(pkt); |
72 | return &pkt->virt_hdr; |
73 | } |
74 | |
75 | static inline void |
76 | net_rx_pkt_iovec_realloc(struct NetRxPkt *pkt, |
77 | int new_iov_len) |
78 | { |
79 | if (pkt->vec_len_total < new_iov_len) { |
80 | g_free(pkt->vec); |
81 | pkt->vec = g_malloc(sizeof(*pkt->vec) * new_iov_len); |
82 | pkt->vec_len_total = new_iov_len; |
83 | } |
84 | } |
85 | |
86 | static void |
87 | net_rx_pkt_pull_data(struct NetRxPkt *pkt, |
88 | const struct iovec *iov, int iovcnt, |
89 | size_t ploff) |
90 | { |
91 | uint32_t pllen = iov_size(iov, iovcnt) - ploff; |
92 | |
93 | if (pkt->ehdr_buf_len) { |
94 | net_rx_pkt_iovec_realloc(pkt, iovcnt + 1); |
95 | |
96 | pkt->vec[0].iov_base = pkt->ehdr_buf; |
97 | pkt->vec[0].iov_len = pkt->ehdr_buf_len; |
98 | |
99 | pkt->tot_len = pllen + pkt->ehdr_buf_len; |
100 | pkt->vec_len = iov_copy(pkt->vec + 1, pkt->vec_len_total - 1, |
101 | iov, iovcnt, ploff, pllen) + 1; |
102 | } else { |
103 | net_rx_pkt_iovec_realloc(pkt, iovcnt); |
104 | |
105 | pkt->tot_len = pllen; |
106 | pkt->vec_len = iov_copy(pkt->vec, pkt->vec_len_total, |
107 | iov, iovcnt, ploff, pkt->tot_len); |
108 | } |
109 | |
110 | eth_get_protocols(pkt->vec, pkt->vec_len, &pkt->isip4, &pkt->isip6, |
111 | &pkt->isudp, &pkt->istcp, |
112 | &pkt->l3hdr_off, &pkt->l4hdr_off, &pkt->l5hdr_off, |
113 | &pkt->ip6hdr_info, &pkt->ip4hdr_info, &pkt->l4hdr_info); |
114 | |
115 | trace_net_rx_pkt_parsed(pkt->isip4, pkt->isip6, pkt->isudp, pkt->istcp, |
116 | pkt->l3hdr_off, pkt->l4hdr_off, pkt->l5hdr_off); |
117 | } |
118 | |
119 | void net_rx_pkt_attach_iovec(struct NetRxPkt *pkt, |
120 | const struct iovec *iov, int iovcnt, |
121 | size_t iovoff, bool strip_vlan) |
122 | { |
123 | uint16_t tci = 0; |
124 | uint16_t ploff = iovoff; |
125 | assert(pkt); |
126 | |
127 | if (strip_vlan) { |
128 | pkt->ehdr_buf_len = eth_strip_vlan(iov, iovcnt, iovoff, pkt->ehdr_buf, |
129 | &ploff, &tci); |
130 | } else { |
131 | pkt->ehdr_buf_len = 0; |
132 | } |
133 | |
134 | pkt->tci = tci; |
135 | |
136 | net_rx_pkt_pull_data(pkt, iov, iovcnt, ploff); |
137 | } |
138 | |
139 | void net_rx_pkt_attach_iovec_ex(struct NetRxPkt *pkt, |
140 | const struct iovec *iov, int iovcnt, |
141 | size_t iovoff, bool strip_vlan, |
142 | uint16_t vet) |
143 | { |
144 | uint16_t tci = 0; |
145 | uint16_t ploff = iovoff; |
146 | assert(pkt); |
147 | |
148 | if (strip_vlan) { |
149 | pkt->ehdr_buf_len = eth_strip_vlan_ex(iov, iovcnt, iovoff, vet, |
150 | pkt->ehdr_buf, |
151 | &ploff, &tci); |
152 | } else { |
153 | pkt->ehdr_buf_len = 0; |
154 | } |
155 | |
156 | pkt->tci = tci; |
157 | |
158 | net_rx_pkt_pull_data(pkt, iov, iovcnt, ploff); |
159 | } |
160 | |
161 | void net_rx_pkt_dump(struct NetRxPkt *pkt) |
162 | { |
163 | #ifdef NET_RX_PKT_DEBUG |
164 | assert(pkt); |
165 | |
166 | printf("RX PKT: tot_len: %d, ehdr_buf_len: %lu, vlan_tag: %d\n" , |
167 | pkt->tot_len, pkt->ehdr_buf_len, pkt->tci); |
168 | #endif |
169 | } |
170 | |
171 | void net_rx_pkt_set_packet_type(struct NetRxPkt *pkt, |
172 | eth_pkt_types_e packet_type) |
173 | { |
174 | assert(pkt); |
175 | |
176 | pkt->packet_type = packet_type; |
177 | |
178 | } |
179 | |
180 | eth_pkt_types_e net_rx_pkt_get_packet_type(struct NetRxPkt *pkt) |
181 | { |
182 | assert(pkt); |
183 | |
184 | return pkt->packet_type; |
185 | } |
186 | |
187 | size_t net_rx_pkt_get_total_len(struct NetRxPkt *pkt) |
188 | { |
189 | assert(pkt); |
190 | |
191 | return pkt->tot_len; |
192 | } |
193 | |
194 | void net_rx_pkt_set_protocols(struct NetRxPkt *pkt, const void *data, |
195 | size_t len) |
196 | { |
197 | const struct iovec iov = { |
198 | .iov_base = (void *)data, |
199 | .iov_len = len |
200 | }; |
201 | |
202 | assert(pkt); |
203 | |
204 | eth_get_protocols(&iov, 1, &pkt->isip4, &pkt->isip6, |
205 | &pkt->isudp, &pkt->istcp, |
206 | &pkt->l3hdr_off, &pkt->l4hdr_off, &pkt->l5hdr_off, |
207 | &pkt->ip6hdr_info, &pkt->ip4hdr_info, &pkt->l4hdr_info); |
208 | } |
209 | |
210 | void net_rx_pkt_get_protocols(struct NetRxPkt *pkt, |
211 | bool *isip4, bool *isip6, |
212 | bool *isudp, bool *istcp) |
213 | { |
214 | assert(pkt); |
215 | |
216 | *isip4 = pkt->isip4; |
217 | *isip6 = pkt->isip6; |
218 | *isudp = pkt->isudp; |
219 | *istcp = pkt->istcp; |
220 | } |
221 | |
222 | size_t net_rx_pkt_get_l3_hdr_offset(struct NetRxPkt *pkt) |
223 | { |
224 | assert(pkt); |
225 | return pkt->l3hdr_off; |
226 | } |
227 | |
228 | size_t net_rx_pkt_get_l4_hdr_offset(struct NetRxPkt *pkt) |
229 | { |
230 | assert(pkt); |
231 | return pkt->l4hdr_off; |
232 | } |
233 | |
234 | size_t net_rx_pkt_get_l5_hdr_offset(struct NetRxPkt *pkt) |
235 | { |
236 | assert(pkt); |
237 | return pkt->l5hdr_off; |
238 | } |
239 | |
240 | eth_ip6_hdr_info *net_rx_pkt_get_ip6_info(struct NetRxPkt *pkt) |
241 | { |
242 | return &pkt->ip6hdr_info; |
243 | } |
244 | |
245 | eth_ip4_hdr_info *net_rx_pkt_get_ip4_info(struct NetRxPkt *pkt) |
246 | { |
247 | return &pkt->ip4hdr_info; |
248 | } |
249 | |
250 | eth_l4_hdr_info *net_rx_pkt_get_l4_info(struct NetRxPkt *pkt) |
251 | { |
252 | return &pkt->l4hdr_info; |
253 | } |
254 | |
255 | static inline void |
256 | (uint8_t *, size_t *bytes_written, |
257 | void *ptr, size_t size) |
258 | { |
259 | memcpy(&rss_input[*bytes_written], ptr, size); |
260 | trace_net_rx_pkt_rss_add_chunk(ptr, size, *bytes_written); |
261 | *bytes_written += size; |
262 | } |
263 | |
264 | static inline void |
265 | (uint8_t *, |
266 | struct NetRxPkt *pkt, |
267 | size_t *bytes_written) |
268 | { |
269 | struct ip_header *ip4_hdr = &pkt->ip4hdr_info.ip4_hdr; |
270 | |
271 | _net_rx_rss_add_chunk(rss_input, bytes_written, |
272 | &ip4_hdr->ip_src, sizeof(uint32_t)); |
273 | |
274 | _net_rx_rss_add_chunk(rss_input, bytes_written, |
275 | &ip4_hdr->ip_dst, sizeof(uint32_t)); |
276 | } |
277 | |
278 | static inline void |
279 | (uint8_t *, |
280 | struct NetRxPkt *pkt, |
281 | bool ipv6ex, size_t *bytes_written) |
282 | { |
283 | eth_ip6_hdr_info *ip6info = &pkt->ip6hdr_info; |
284 | |
285 | _net_rx_rss_add_chunk(rss_input, bytes_written, |
286 | (ipv6ex && ip6info->rss_ex_src_valid) ? &ip6info->rss_ex_src |
287 | : &ip6info->ip6_hdr.ip6_src, |
288 | sizeof(struct in6_address)); |
289 | |
290 | _net_rx_rss_add_chunk(rss_input, bytes_written, |
291 | (ipv6ex && ip6info->rss_ex_dst_valid) ? &ip6info->rss_ex_dst |
292 | : &ip6info->ip6_hdr.ip6_dst, |
293 | sizeof(struct in6_address)); |
294 | } |
295 | |
296 | static inline void |
297 | (uint8_t *, |
298 | struct NetRxPkt *pkt, |
299 | size_t *bytes_written) |
300 | { |
301 | struct tcp_header *tcphdr = &pkt->l4hdr_info.hdr.tcp; |
302 | |
303 | _net_rx_rss_add_chunk(rss_input, bytes_written, |
304 | &tcphdr->th_sport, sizeof(uint16_t)); |
305 | |
306 | _net_rx_rss_add_chunk(rss_input, bytes_written, |
307 | &tcphdr->th_dport, sizeof(uint16_t)); |
308 | } |
309 | |
310 | uint32_t |
311 | (struct NetRxPkt *pkt, |
312 | NetRxPktRssType type, |
313 | uint8_t *key) |
314 | { |
315 | uint8_t [36]; |
316 | size_t = 0; |
317 | uint32_t = 0; |
318 | net_toeplitz_key key_data; |
319 | |
320 | switch (type) { |
321 | case NetPktRssIpV4: |
322 | assert(pkt->isip4); |
323 | trace_net_rx_pkt_rss_ip4(); |
324 | _net_rx_rss_prepare_ip4(&rss_input[0], pkt, &rss_length); |
325 | break; |
326 | case NetPktRssIpV4Tcp: |
327 | assert(pkt->isip4); |
328 | assert(pkt->istcp); |
329 | trace_net_rx_pkt_rss_ip4_tcp(); |
330 | _net_rx_rss_prepare_ip4(&rss_input[0], pkt, &rss_length); |
331 | _net_rx_rss_prepare_tcp(&rss_input[0], pkt, &rss_length); |
332 | break; |
333 | case NetPktRssIpV6Tcp: |
334 | assert(pkt->isip6); |
335 | assert(pkt->istcp); |
336 | trace_net_rx_pkt_rss_ip6_tcp(); |
337 | _net_rx_rss_prepare_ip6(&rss_input[0], pkt, true, &rss_length); |
338 | _net_rx_rss_prepare_tcp(&rss_input[0], pkt, &rss_length); |
339 | break; |
340 | case NetPktRssIpV6: |
341 | assert(pkt->isip6); |
342 | trace_net_rx_pkt_rss_ip6(); |
343 | _net_rx_rss_prepare_ip6(&rss_input[0], pkt, false, &rss_length); |
344 | break; |
345 | case NetPktRssIpV6Ex: |
346 | assert(pkt->isip6); |
347 | trace_net_rx_pkt_rss_ip6_ex(); |
348 | _net_rx_rss_prepare_ip6(&rss_input[0], pkt, true, &rss_length); |
349 | break; |
350 | default: |
351 | assert(false); |
352 | break; |
353 | } |
354 | |
355 | net_toeplitz_key_init(&key_data, key); |
356 | net_toeplitz_add(&rss_hash, rss_input, rss_length, &key_data); |
357 | |
358 | trace_net_rx_pkt_rss_hash(rss_length, rss_hash); |
359 | |
360 | return rss_hash; |
361 | } |
362 | |
363 | uint16_t net_rx_pkt_get_ip_id(struct NetRxPkt *pkt) |
364 | { |
365 | assert(pkt); |
366 | |
367 | if (pkt->isip4) { |
368 | return be16_to_cpu(pkt->ip4hdr_info.ip4_hdr.ip_id); |
369 | } |
370 | |
371 | return 0; |
372 | } |
373 | |
374 | bool net_rx_pkt_is_tcp_ack(struct NetRxPkt *pkt) |
375 | { |
376 | assert(pkt); |
377 | |
378 | if (pkt->istcp) { |
379 | return TCP_HEADER_FLAGS(&pkt->l4hdr_info.hdr.tcp) & TCP_FLAG_ACK; |
380 | } |
381 | |
382 | return false; |
383 | } |
384 | |
385 | bool net_rx_pkt_has_tcp_data(struct NetRxPkt *pkt) |
386 | { |
387 | assert(pkt); |
388 | |
389 | if (pkt->istcp) { |
390 | return pkt->l4hdr_info.has_tcp_data; |
391 | } |
392 | |
393 | return false; |
394 | } |
395 | |
396 | struct iovec *net_rx_pkt_get_iovec(struct NetRxPkt *pkt) |
397 | { |
398 | assert(pkt); |
399 | |
400 | return pkt->vec; |
401 | } |
402 | |
403 | uint16_t net_rx_pkt_get_iovec_len(struct NetRxPkt *pkt) |
404 | { |
405 | assert(pkt); |
406 | |
407 | return pkt->vec_len; |
408 | } |
409 | |
410 | void net_rx_pkt_set_vhdr(struct NetRxPkt *pkt, |
411 | struct virtio_net_hdr *vhdr) |
412 | { |
413 | assert(pkt); |
414 | |
415 | memcpy(&pkt->virt_hdr, vhdr, sizeof pkt->virt_hdr); |
416 | } |
417 | |
418 | void net_rx_pkt_set_vhdr_iovec(struct NetRxPkt *pkt, |
419 | const struct iovec *iov, int iovcnt) |
420 | { |
421 | assert(pkt); |
422 | |
423 | iov_to_buf(iov, iovcnt, 0, &pkt->virt_hdr, sizeof pkt->virt_hdr); |
424 | } |
425 | |
426 | bool net_rx_pkt_is_vlan_stripped(struct NetRxPkt *pkt) |
427 | { |
428 | assert(pkt); |
429 | |
430 | return pkt->ehdr_buf_len ? true : false; |
431 | } |
432 | |
433 | bool net_rx_pkt_has_virt_hdr(struct NetRxPkt *pkt) |
434 | { |
435 | assert(pkt); |
436 | |
437 | return pkt->has_virt_hdr; |
438 | } |
439 | |
440 | uint16_t net_rx_pkt_get_vlan_tag(struct NetRxPkt *pkt) |
441 | { |
442 | assert(pkt); |
443 | |
444 | return pkt->tci; |
445 | } |
446 | |
447 | bool net_rx_pkt_validate_l3_csum(struct NetRxPkt *pkt, bool *csum_valid) |
448 | { |
449 | uint32_t cntr; |
450 | uint16_t csum; |
451 | uint32_t csl; |
452 | |
453 | trace_net_rx_pkt_l3_csum_validate_entry(); |
454 | |
455 | if (!pkt->isip4) { |
456 | trace_net_rx_pkt_l3_csum_validate_not_ip4(); |
457 | return false; |
458 | } |
459 | |
460 | csl = pkt->l4hdr_off - pkt->l3hdr_off; |
461 | |
462 | cntr = net_checksum_add_iov(pkt->vec, pkt->vec_len, |
463 | pkt->l3hdr_off, |
464 | csl, 0); |
465 | |
466 | csum = net_checksum_finish(cntr); |
467 | |
468 | *csum_valid = (csum == 0); |
469 | |
470 | trace_net_rx_pkt_l3_csum_validate_csum(pkt->l3hdr_off, csl, |
471 | cntr, csum, *csum_valid); |
472 | |
473 | return true; |
474 | } |
475 | |
476 | static uint16_t |
477 | _net_rx_pkt_calc_l4_csum(struct NetRxPkt *pkt) |
478 | { |
479 | uint32_t cntr; |
480 | uint16_t csum; |
481 | uint16_t csl; |
482 | uint32_t cso; |
483 | |
484 | trace_net_rx_pkt_l4_csum_calc_entry(); |
485 | |
486 | if (pkt->isip4) { |
487 | if (pkt->isudp) { |
488 | csl = be16_to_cpu(pkt->l4hdr_info.hdr.udp.uh_ulen); |
489 | trace_net_rx_pkt_l4_csum_calc_ip4_udp(); |
490 | } else { |
491 | csl = be16_to_cpu(pkt->ip4hdr_info.ip4_hdr.ip_len) - |
492 | IP_HDR_GET_LEN(&pkt->ip4hdr_info.ip4_hdr); |
493 | trace_net_rx_pkt_l4_csum_calc_ip4_tcp(); |
494 | } |
495 | |
496 | cntr = eth_calc_ip4_pseudo_hdr_csum(&pkt->ip4hdr_info.ip4_hdr, |
497 | csl, &cso); |
498 | trace_net_rx_pkt_l4_csum_calc_ph_csum(cntr, csl); |
499 | } else { |
500 | if (pkt->isudp) { |
501 | csl = be16_to_cpu(pkt->l4hdr_info.hdr.udp.uh_ulen); |
502 | trace_net_rx_pkt_l4_csum_calc_ip6_udp(); |
503 | } else { |
504 | struct ip6_header *ip6hdr = &pkt->ip6hdr_info.ip6_hdr; |
505 | size_t full_ip6hdr_len = pkt->l4hdr_off - pkt->l3hdr_off; |
506 | size_t ip6opts_len = full_ip6hdr_len - sizeof(struct ip6_header); |
507 | |
508 | csl = be16_to_cpu(ip6hdr->ip6_ctlun.ip6_un1.ip6_un1_plen) - |
509 | ip6opts_len; |
510 | trace_net_rx_pkt_l4_csum_calc_ip6_tcp(); |
511 | } |
512 | |
513 | cntr = eth_calc_ip6_pseudo_hdr_csum(&pkt->ip6hdr_info.ip6_hdr, csl, |
514 | pkt->ip6hdr_info.l4proto, &cso); |
515 | trace_net_rx_pkt_l4_csum_calc_ph_csum(cntr, csl); |
516 | } |
517 | |
518 | cntr += net_checksum_add_iov(pkt->vec, pkt->vec_len, |
519 | pkt->l4hdr_off, csl, cso); |
520 | |
521 | csum = net_checksum_finish_nozero(cntr); |
522 | |
523 | trace_net_rx_pkt_l4_csum_calc_csum(pkt->l4hdr_off, csl, cntr, csum); |
524 | |
525 | return csum; |
526 | } |
527 | |
528 | bool net_rx_pkt_validate_l4_csum(struct NetRxPkt *pkt, bool *csum_valid) |
529 | { |
530 | uint16_t csum; |
531 | |
532 | trace_net_rx_pkt_l4_csum_validate_entry(); |
533 | |
534 | if (!pkt->istcp && !pkt->isudp) { |
535 | trace_net_rx_pkt_l4_csum_validate_not_xxp(); |
536 | return false; |
537 | } |
538 | |
539 | if (pkt->isudp && (pkt->l4hdr_info.hdr.udp.uh_sum == 0)) { |
540 | trace_net_rx_pkt_l4_csum_validate_udp_with_no_checksum(); |
541 | return false; |
542 | } |
543 | |
544 | if (pkt->isip4 && pkt->ip4hdr_info.fragment) { |
545 | trace_net_rx_pkt_l4_csum_validate_ip4_fragment(); |
546 | return false; |
547 | } |
548 | |
549 | csum = _net_rx_pkt_calc_l4_csum(pkt); |
550 | |
551 | *csum_valid = ((csum == 0) || (csum == 0xFFFF)); |
552 | |
553 | trace_net_rx_pkt_l4_csum_validate_csum(*csum_valid); |
554 | |
555 | return true; |
556 | } |
557 | |
558 | bool net_rx_pkt_fix_l4_csum(struct NetRxPkt *pkt) |
559 | { |
560 | uint16_t csum = 0; |
561 | uint32_t l4_cso; |
562 | |
563 | trace_net_rx_pkt_l4_csum_fix_entry(); |
564 | |
565 | if (pkt->istcp) { |
566 | l4_cso = offsetof(struct tcp_header, th_sum); |
567 | trace_net_rx_pkt_l4_csum_fix_tcp(l4_cso); |
568 | } else if (pkt->isudp) { |
569 | if (pkt->l4hdr_info.hdr.udp.uh_sum == 0) { |
570 | trace_net_rx_pkt_l4_csum_fix_udp_with_no_checksum(); |
571 | return false; |
572 | } |
573 | l4_cso = offsetof(struct udp_header, uh_sum); |
574 | trace_net_rx_pkt_l4_csum_fix_udp(l4_cso); |
575 | } else { |
576 | trace_net_rx_pkt_l4_csum_fix_not_xxp(); |
577 | return false; |
578 | } |
579 | |
580 | if (pkt->isip4 && pkt->ip4hdr_info.fragment) { |
581 | trace_net_rx_pkt_l4_csum_fix_ip4_fragment(); |
582 | return false; |
583 | } |
584 | |
585 | /* Set zero to checksum word */ |
586 | iov_from_buf(pkt->vec, pkt->vec_len, |
587 | pkt->l4hdr_off + l4_cso, |
588 | &csum, sizeof(csum)); |
589 | |
590 | /* Calculate L4 checksum */ |
591 | csum = cpu_to_be16(_net_rx_pkt_calc_l4_csum(pkt)); |
592 | |
593 | /* Set calculated checksum to checksum word */ |
594 | iov_from_buf(pkt->vec, pkt->vec_len, |
595 | pkt->l4hdr_off + l4_cso, |
596 | &csum, sizeof(csum)); |
597 | |
598 | trace_net_rx_pkt_l4_csum_fix_csum(pkt->l4hdr_off + l4_cso, csum); |
599 | |
600 | return true; |
601 | } |
602 | |