Commit | Line | Data |
---|---|---|
fbff949e | 1 | #include <linux/kernel.h> |
0744dd00 | 2 | #include <linux/skbuff.h> |
c452ed70 | 3 | #include <linux/export.h> |
0744dd00 ED |
4 | #include <linux/ip.h> |
5 | #include <linux/ipv6.h> | |
6 | #include <linux/if_vlan.h> | |
7 | #include <net/ip.h> | |
ddbe5032 | 8 | #include <net/ipv6.h> |
ab10dccb GF |
9 | #include <net/gre.h> |
10 | #include <net/pptp.h> | |
f77668dc DB |
11 | #include <linux/igmp.h> |
12 | #include <linux/icmp.h> | |
13 | #include <linux/sctp.h> | |
14 | #include <linux/dccp.h> | |
0744dd00 ED |
15 | #include <linux/if_tunnel.h> |
16 | #include <linux/if_pppox.h> | |
17 | #include <linux/ppp_defs.h> | |
06635a35 | 18 | #include <linux/stddef.h> |
67a900cc | 19 | #include <linux/if_ether.h> |
b3baa0fb | 20 | #include <linux/mpls.h> |
1bd758eb | 21 | #include <net/flow_dissector.h> |
56193d1b | 22 | #include <scsi/fc/fc_fcoe.h> |
0744dd00 | 23 | |
20a17bf6 DM |
24 | static void dissector_set_key(struct flow_dissector *flow_dissector, |
25 | enum flow_dissector_key_id key_id) | |
fbff949e JP |
26 | { |
27 | flow_dissector->used_keys |= (1 << key_id); | |
28 | } | |
29 | ||
fbff949e JP |
30 | void skb_flow_dissector_init(struct flow_dissector *flow_dissector, |
31 | const struct flow_dissector_key *key, | |
32 | unsigned int key_count) | |
33 | { | |
34 | unsigned int i; | |
35 | ||
36 | memset(flow_dissector, 0, sizeof(*flow_dissector)); | |
37 | ||
38 | for (i = 0; i < key_count; i++, key++) { | |
39 | /* User should make sure that every key target offset is withing | |
40 | * boundaries of unsigned short. | |
41 | */ | |
42 | BUG_ON(key->offset > USHRT_MAX); | |
20a17bf6 DM |
43 | BUG_ON(dissector_uses_key(flow_dissector, |
44 | key->key_id)); | |
fbff949e | 45 | |
20a17bf6 | 46 | dissector_set_key(flow_dissector, key->key_id); |
fbff949e JP |
47 | flow_dissector->offset[key->key_id] = key->offset; |
48 | } | |
49 | ||
42aecaa9 TH |
50 | /* Ensure that the dissector always includes control and basic key. |
51 | * That way we are able to avoid handling lack of these in fast path. | |
fbff949e | 52 | */ |
20a17bf6 DM |
53 | BUG_ON(!dissector_uses_key(flow_dissector, |
54 | FLOW_DISSECTOR_KEY_CONTROL)); | |
55 | BUG_ON(!dissector_uses_key(flow_dissector, | |
56 | FLOW_DISSECTOR_KEY_BASIC)); | |
fbff949e JP |
57 | } |
58 | EXPORT_SYMBOL(skb_flow_dissector_init); | |
59 | ||
357afe9c | 60 | /** |
6451b3f5 WC |
61 | * __skb_flow_get_ports - extract the upper layer ports and return them |
62 | * @skb: sk_buff to extract the ports from | |
357afe9c NA |
63 | * @thoff: transport header offset |
64 | * @ip_proto: protocol for which to get port offset | |
6451b3f5 WC |
65 | * @data: raw buffer pointer to the packet, if NULL use skb->data |
66 | * @hlen: packet header length, if @data is NULL use skb_headlen(skb) | |
357afe9c NA |
67 | * |
68 | * The function will try to retrieve the ports at offset thoff + poff where poff | |
69 | * is the protocol port offset returned from proto_ports_offset | |
70 | */ | |
690e36e7 DM |
71 | __be32 __skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto, |
72 | void *data, int hlen) | |
357afe9c NA |
73 | { |
74 | int poff = proto_ports_offset(ip_proto); | |
75 | ||
690e36e7 DM |
76 | if (!data) { |
77 | data = skb->data; | |
78 | hlen = skb_headlen(skb); | |
79 | } | |
80 | ||
357afe9c NA |
81 | if (poff >= 0) { |
82 | __be32 *ports, _ports; | |
83 | ||
690e36e7 DM |
84 | ports = __skb_header_pointer(skb, thoff + poff, |
85 | sizeof(_ports), data, hlen, &_ports); | |
357afe9c NA |
86 | if (ports) |
87 | return *ports; | |
88 | } | |
89 | ||
90 | return 0; | |
91 | } | |
690e36e7 | 92 | EXPORT_SYMBOL(__skb_flow_get_ports); |
357afe9c | 93 | |
453a940e WC |
94 | /** |
95 | * __skb_flow_dissect - extract the flow_keys struct and return it | |
96 | * @skb: sk_buff to extract the flow from, can be NULL if the rest are specified | |
06635a35 JP |
97 | * @flow_dissector: list of keys to dissect |
98 | * @target_container: target structure to put dissected values into | |
453a940e WC |
99 | * @data: raw buffer pointer to the packet, if NULL use skb->data |
100 | * @proto: protocol for which to get the flow, if @data is NULL use skb->protocol | |
101 | * @nhoff: network header offset, if @data is NULL use skb_network_offset(skb) | |
102 | * @hlen: packet header length, if @data is NULL use skb_headlen(skb) | |
103 | * | |
06635a35 JP |
104 | * The function will try to retrieve individual keys into target specified |
105 | * by flow_dissector from either the skbuff or a raw buffer specified by the | |
106 | * rest parameters. | |
107 | * | |
108 | * Caller must take care of zeroing target container memory. | |
453a940e | 109 | */ |
06635a35 JP |
110 | bool __skb_flow_dissect(const struct sk_buff *skb, |
111 | struct flow_dissector *flow_dissector, | |
112 | void *target_container, | |
cd79a238 TH |
113 | void *data, __be16 proto, int nhoff, int hlen, |
114 | unsigned int flags) | |
0744dd00 | 115 | { |
42aecaa9 | 116 | struct flow_dissector_key_control *key_control; |
06635a35 JP |
117 | struct flow_dissector_key_basic *key_basic; |
118 | struct flow_dissector_key_addrs *key_addrs; | |
119 | struct flow_dissector_key_ports *key_ports; | |
d34af823 | 120 | struct flow_dissector_key_tags *key_tags; |
f6a66927 | 121 | struct flow_dissector_key_vlan *key_vlan; |
1fdd512c | 122 | struct flow_dissector_key_keyid *key_keyid; |
d5709f7a | 123 | bool skip_vlan = false; |
8e690ffd | 124 | u8 ip_proto = 0; |
a6e544b0 | 125 | bool ret = false; |
0744dd00 | 126 | |
690e36e7 DM |
127 | if (!data) { |
128 | data = skb->data; | |
d5709f7a HHZ |
129 | proto = skb_vlan_tag_present(skb) ? |
130 | skb->vlan_proto : skb->protocol; | |
453a940e | 131 | nhoff = skb_network_offset(skb); |
690e36e7 DM |
132 | hlen = skb_headlen(skb); |
133 | } | |
134 | ||
42aecaa9 TH |
135 | /* It is ensured by skb_flow_dissector_init() that control key will |
136 | * be always present. | |
137 | */ | |
138 | key_control = skb_flow_dissector_target(flow_dissector, | |
139 | FLOW_DISSECTOR_KEY_CONTROL, | |
140 | target_container); | |
141 | ||
06635a35 JP |
142 | /* It is ensured by skb_flow_dissector_init() that basic key will |
143 | * be always present. | |
144 | */ | |
145 | key_basic = skb_flow_dissector_target(flow_dissector, | |
146 | FLOW_DISSECTOR_KEY_BASIC, | |
147 | target_container); | |
0744dd00 | 148 | |
20a17bf6 DM |
149 | if (dissector_uses_key(flow_dissector, |
150 | FLOW_DISSECTOR_KEY_ETH_ADDRS)) { | |
67a900cc JP |
151 | struct ethhdr *eth = eth_hdr(skb); |
152 | struct flow_dissector_key_eth_addrs *key_eth_addrs; | |
153 | ||
154 | key_eth_addrs = skb_flow_dissector_target(flow_dissector, | |
155 | FLOW_DISSECTOR_KEY_ETH_ADDRS, | |
156 | target_container); | |
157 | memcpy(key_eth_addrs, ð->h_dest, sizeof(*key_eth_addrs)); | |
158 | } | |
159 | ||
0744dd00 ED |
160 | again: |
161 | switch (proto) { | |
2b8837ae | 162 | case htons(ETH_P_IP): { |
0744dd00 ED |
163 | const struct iphdr *iph; |
164 | struct iphdr _iph; | |
165 | ip: | |
690e36e7 | 166 | iph = __skb_header_pointer(skb, nhoff, sizeof(_iph), data, hlen, &_iph); |
6f092343 | 167 | if (!iph || iph->ihl < 5) |
a6e544b0 | 168 | goto out_bad; |
3797d3e8 | 169 | nhoff += iph->ihl * 4; |
0744dd00 | 170 | |
3797d3e8 | 171 | ip_proto = iph->protocol; |
3797d3e8 | 172 | |
918c023f AD |
173 | if (dissector_uses_key(flow_dissector, |
174 | FLOW_DISSECTOR_KEY_IPV4_ADDRS)) { | |
175 | key_addrs = skb_flow_dissector_target(flow_dissector, | |
176 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, | |
177 | target_container); | |
178 | ||
179 | memcpy(&key_addrs->v4addrs, &iph->saddr, | |
180 | sizeof(key_addrs->v4addrs)); | |
181 | key_control->addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
182 | } | |
807e165d TH |
183 | |
184 | if (ip_is_fragment(iph)) { | |
4b36993d | 185 | key_control->flags |= FLOW_DIS_IS_FRAGMENT; |
807e165d TH |
186 | |
187 | if (iph->frag_off & htons(IP_OFFSET)) { | |
188 | goto out_good; | |
189 | } else { | |
4b36993d | 190 | key_control->flags |= FLOW_DIS_FIRST_FRAG; |
807e165d TH |
191 | if (!(flags & FLOW_DISSECTOR_F_PARSE_1ST_FRAG)) |
192 | goto out_good; | |
193 | } | |
194 | } | |
195 | ||
8306b688 TH |
196 | if (flags & FLOW_DISSECTOR_F_STOP_AT_L3) |
197 | goto out_good; | |
198 | ||
0744dd00 ED |
199 | break; |
200 | } | |
2b8837ae | 201 | case htons(ETH_P_IPV6): { |
0744dd00 ED |
202 | const struct ipv6hdr *iph; |
203 | struct ipv6hdr _iph; | |
19469a87 | 204 | |
0744dd00 | 205 | ipv6: |
690e36e7 | 206 | iph = __skb_header_pointer(skb, nhoff, sizeof(_iph), data, hlen, &_iph); |
0744dd00 | 207 | if (!iph) |
a6e544b0 | 208 | goto out_bad; |
0744dd00 ED |
209 | |
210 | ip_proto = iph->nexthdr; | |
0744dd00 | 211 | nhoff += sizeof(struct ipv6hdr); |
19469a87 | 212 | |
20a17bf6 DM |
213 | if (dissector_uses_key(flow_dissector, |
214 | FLOW_DISSECTOR_KEY_IPV6_ADDRS)) { | |
b3c3106c AD |
215 | key_addrs = skb_flow_dissector_target(flow_dissector, |
216 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, | |
217 | target_container); | |
5af7fb6e | 218 | |
b3c3106c AD |
219 | memcpy(&key_addrs->v6addrs, &iph->saddr, |
220 | sizeof(key_addrs->v6addrs)); | |
c3f83241 | 221 | key_control->addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; |
b924933c | 222 | } |
87ee9e52 | 223 | |
461547f3 AD |
224 | if ((dissector_uses_key(flow_dissector, |
225 | FLOW_DISSECTOR_KEY_FLOW_LABEL) || | |
226 | (flags & FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL)) && | |
227 | ip6_flowlabel(iph)) { | |
228 | __be32 flow_label = ip6_flowlabel(iph); | |
229 | ||
20a17bf6 DM |
230 | if (dissector_uses_key(flow_dissector, |
231 | FLOW_DISSECTOR_KEY_FLOW_LABEL)) { | |
87ee9e52 TH |
232 | key_tags = skb_flow_dissector_target(flow_dissector, |
233 | FLOW_DISSECTOR_KEY_FLOW_LABEL, | |
234 | target_container); | |
235 | key_tags->flow_label = ntohl(flow_label); | |
12c227ec | 236 | } |
872b1abb TH |
237 | if (flags & FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL) |
238 | goto out_good; | |
19469a87 TH |
239 | } |
240 | ||
8306b688 TH |
241 | if (flags & FLOW_DISSECTOR_F_STOP_AT_L3) |
242 | goto out_good; | |
243 | ||
0744dd00 ED |
244 | break; |
245 | } | |
2b8837ae JP |
246 | case htons(ETH_P_8021AD): |
247 | case htons(ETH_P_8021Q): { | |
0744dd00 | 248 | const struct vlan_hdr *vlan; |
0744dd00 | 249 | |
d5709f7a HHZ |
250 | if (skb_vlan_tag_present(skb)) |
251 | proto = skb->protocol; | |
252 | ||
253 | if (!skb_vlan_tag_present(skb) || | |
254 | proto == cpu_to_be16(ETH_P_8021Q) || | |
255 | proto == cpu_to_be16(ETH_P_8021AD)) { | |
256 | struct vlan_hdr _vlan; | |
257 | ||
258 | vlan = __skb_header_pointer(skb, nhoff, sizeof(_vlan), | |
259 | data, hlen, &_vlan); | |
260 | if (!vlan) | |
261 | goto out_bad; | |
262 | proto = vlan->h_vlan_encapsulated_proto; | |
263 | nhoff += sizeof(*vlan); | |
264 | if (skip_vlan) | |
265 | goto again; | |
266 | } | |
0744dd00 | 267 | |
d5709f7a | 268 | skip_vlan = true; |
20a17bf6 | 269 | if (dissector_uses_key(flow_dissector, |
f6a66927 HHZ |
270 | FLOW_DISSECTOR_KEY_VLAN)) { |
271 | key_vlan = skb_flow_dissector_target(flow_dissector, | |
272 | FLOW_DISSECTOR_KEY_VLAN, | |
d34af823 TH |
273 | target_container); |
274 | ||
f6a66927 HHZ |
275 | if (skb_vlan_tag_present(skb)) { |
276 | key_vlan->vlan_id = skb_vlan_tag_get_id(skb); | |
277 | key_vlan->vlan_priority = | |
278 | (skb_vlan_tag_get_prio(skb) >> VLAN_PRIO_SHIFT); | |
279 | } else { | |
280 | key_vlan->vlan_id = ntohs(vlan->h_vlan_TCI) & | |
d5709f7a | 281 | VLAN_VID_MASK; |
f6a66927 HHZ |
282 | key_vlan->vlan_priority = |
283 | (ntohs(vlan->h_vlan_TCI) & | |
284 | VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; | |
285 | } | |
d34af823 TH |
286 | } |
287 | ||
0744dd00 ED |
288 | goto again; |
289 | } | |
2b8837ae | 290 | case htons(ETH_P_PPP_SES): { |
0744dd00 ED |
291 | struct { |
292 | struct pppoe_hdr hdr; | |
293 | __be16 proto; | |
294 | } *hdr, _hdr; | |
690e36e7 | 295 | hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data, hlen, &_hdr); |
0744dd00 | 296 | if (!hdr) |
a6e544b0 | 297 | goto out_bad; |
0744dd00 ED |
298 | proto = hdr->proto; |
299 | nhoff += PPPOE_SES_HLEN; | |
300 | switch (proto) { | |
2b8837ae | 301 | case htons(PPP_IP): |
0744dd00 | 302 | goto ip; |
2b8837ae | 303 | case htons(PPP_IPV6): |
0744dd00 ED |
304 | goto ipv6; |
305 | default: | |
a6e544b0 | 306 | goto out_bad; |
0744dd00 ED |
307 | } |
308 | } | |
08bfc9cb EH |
309 | case htons(ETH_P_TIPC): { |
310 | struct { | |
311 | __be32 pre[3]; | |
312 | __be32 srcnode; | |
313 | } *hdr, _hdr; | |
314 | hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data, hlen, &_hdr); | |
315 | if (!hdr) | |
a6e544b0 | 316 | goto out_bad; |
06635a35 | 317 | |
20a17bf6 DM |
318 | if (dissector_uses_key(flow_dissector, |
319 | FLOW_DISSECTOR_KEY_TIPC_ADDRS)) { | |
06635a35 | 320 | key_addrs = skb_flow_dissector_target(flow_dissector, |
9f249089 | 321 | FLOW_DISSECTOR_KEY_TIPC_ADDRS, |
06635a35 | 322 | target_container); |
9f249089 TH |
323 | key_addrs->tipcaddrs.srcnode = hdr->srcnode; |
324 | key_control->addr_type = FLOW_DISSECTOR_KEY_TIPC_ADDRS; | |
06635a35 | 325 | } |
a6e544b0 | 326 | goto out_good; |
08bfc9cb | 327 | } |
b3baa0fb TH |
328 | |
329 | case htons(ETH_P_MPLS_UC): | |
330 | case htons(ETH_P_MPLS_MC): { | |
331 | struct mpls_label *hdr, _hdr[2]; | |
332 | mpls: | |
333 | hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data, | |
334 | hlen, &_hdr); | |
335 | if (!hdr) | |
a6e544b0 | 336 | goto out_bad; |
b3baa0fb | 337 | |
611d23c5 TH |
338 | if ((ntohl(hdr[0].entry) & MPLS_LS_LABEL_MASK) >> |
339 | MPLS_LS_LABEL_SHIFT == MPLS_LABEL_ENTROPY) { | |
20a17bf6 DM |
340 | if (dissector_uses_key(flow_dissector, |
341 | FLOW_DISSECTOR_KEY_MPLS_ENTROPY)) { | |
b3baa0fb TH |
342 | key_keyid = skb_flow_dissector_target(flow_dissector, |
343 | FLOW_DISSECTOR_KEY_MPLS_ENTROPY, | |
344 | target_container); | |
345 | key_keyid->keyid = hdr[1].entry & | |
346 | htonl(MPLS_LS_LABEL_MASK); | |
347 | } | |
348 | ||
a6e544b0 | 349 | goto out_good; |
b3baa0fb TH |
350 | } |
351 | ||
a6e544b0 | 352 | goto out_good; |
b3baa0fb TH |
353 | } |
354 | ||
56193d1b | 355 | case htons(ETH_P_FCOE): |
224516b3 AD |
356 | if ((hlen - nhoff) < FCOE_HEADER_LEN) |
357 | goto out_bad; | |
358 | ||
359 | nhoff += FCOE_HEADER_LEN; | |
360 | goto out_good; | |
0744dd00 | 361 | default: |
a6e544b0 | 362 | goto out_bad; |
0744dd00 ED |
363 | } |
364 | ||
6a74fcf4 | 365 | ip_proto_again: |
0744dd00 ED |
366 | switch (ip_proto) { |
367 | case IPPROTO_GRE: { | |
ab10dccb GF |
368 | struct gre_base_hdr *hdr, _hdr; |
369 | u16 gre_ver; | |
370 | int offset = 0; | |
0744dd00 | 371 | |
690e36e7 | 372 | hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data, hlen, &_hdr); |
0744dd00 | 373 | if (!hdr) |
a6e544b0 | 374 | goto out_bad; |
ab10dccb GF |
375 | |
376 | /* Only look inside GRE without routing */ | |
377 | if (hdr->flags & GRE_ROUTING) | |
ce3b5355 TH |
378 | break; |
379 | ||
ab10dccb GF |
380 | /* Only look inside GRE for version 0 and 1 */ |
381 | gre_ver = ntohs(hdr->flags & GRE_VERSION); | |
382 | if (gre_ver > 1) | |
383 | break; | |
384 | ||
385 | proto = hdr->protocol; | |
386 | if (gre_ver) { | |
387 | /* Version1 must be PPTP, and check the flags */ | |
388 | if (!(proto == GRE_PROTO_PPP && (hdr->flags & GRE_KEY))) | |
389 | break; | |
390 | } | |
391 | ||
392 | offset += sizeof(struct gre_base_hdr); | |
393 | ||
ce3b5355 | 394 | if (hdr->flags & GRE_CSUM) |
ab10dccb GF |
395 | offset += sizeof(((struct gre_full_hdr *)0)->csum) + |
396 | sizeof(((struct gre_full_hdr *)0)->reserved1); | |
397 | ||
1fdd512c TH |
398 | if (hdr->flags & GRE_KEY) { |
399 | const __be32 *keyid; | |
400 | __be32 _keyid; | |
401 | ||
ab10dccb | 402 | keyid = __skb_header_pointer(skb, nhoff + offset, sizeof(_keyid), |
1fdd512c | 403 | data, hlen, &_keyid); |
1fdd512c | 404 | if (!keyid) |
a6e544b0 | 405 | goto out_bad; |
1fdd512c | 406 | |
20a17bf6 DM |
407 | if (dissector_uses_key(flow_dissector, |
408 | FLOW_DISSECTOR_KEY_GRE_KEYID)) { | |
1fdd512c TH |
409 | key_keyid = skb_flow_dissector_target(flow_dissector, |
410 | FLOW_DISSECTOR_KEY_GRE_KEYID, | |
411 | target_container); | |
ab10dccb GF |
412 | if (gre_ver == 0) |
413 | key_keyid->keyid = *keyid; | |
414 | else | |
415 | key_keyid->keyid = *keyid & GRE_PPTP_KEY_MASK; | |
1fdd512c | 416 | } |
ab10dccb | 417 | offset += sizeof(((struct gre_full_hdr *)0)->key); |
1fdd512c | 418 | } |
ab10dccb | 419 | |
ce3b5355 | 420 | if (hdr->flags & GRE_SEQ) |
ab10dccb GF |
421 | offset += sizeof(((struct pptp_gre_header *)0)->seq); |
422 | ||
423 | if (gre_ver == 0) { | |
424 | if (proto == htons(ETH_P_TEB)) { | |
425 | const struct ethhdr *eth; | |
426 | struct ethhdr _eth; | |
427 | ||
428 | eth = __skb_header_pointer(skb, nhoff + offset, | |
429 | sizeof(_eth), | |
430 | data, hlen, &_eth); | |
431 | if (!eth) | |
432 | goto out_bad; | |
433 | proto = eth->h_proto; | |
434 | offset += sizeof(*eth); | |
435 | ||
436 | /* Cap headers that we access via pointers at the | |
437 | * end of the Ethernet header as our maximum alignment | |
438 | * at that point is only 2 bytes. | |
439 | */ | |
440 | if (NET_IP_ALIGN) | |
441 | hlen = (nhoff + offset); | |
442 | } | |
443 | } else { /* version 1, must be PPTP */ | |
444 | u8 _ppp_hdr[PPP_HDRLEN]; | |
445 | u8 *ppp_hdr; | |
446 | ||
447 | if (hdr->flags & GRE_ACK) | |
448 | offset += sizeof(((struct pptp_gre_header *)0)->ack); | |
449 | ||
450 | ppp_hdr = skb_header_pointer(skb, nhoff + offset, | |
451 | sizeof(_ppp_hdr), _ppp_hdr); | |
452 | if (!ppp_hdr) | |
a6e544b0 | 453 | goto out_bad; |
ab10dccb GF |
454 | |
455 | switch (PPP_PROTOCOL(ppp_hdr)) { | |
456 | case PPP_IP: | |
457 | proto = htons(ETH_P_IP); | |
458 | break; | |
459 | case PPP_IPV6: | |
460 | proto = htons(ETH_P_IPV6); | |
461 | break; | |
462 | default: | |
463 | /* Could probably catch some more like MPLS */ | |
464 | break; | |
465 | } | |
466 | ||
467 | offset += PPP_HDRLEN; | |
0744dd00 | 468 | } |
823b9693 | 469 | |
ab10dccb | 470 | nhoff += offset; |
4b36993d | 471 | key_control->flags |= FLOW_DIS_ENCAPSULATION; |
823b9693 TH |
472 | if (flags & FLOW_DISSECTOR_F_STOP_AT_ENCAP) |
473 | goto out_good; | |
474 | ||
ce3b5355 | 475 | goto again; |
0744dd00 | 476 | } |
6a74fcf4 TH |
477 | case NEXTHDR_HOP: |
478 | case NEXTHDR_ROUTING: | |
479 | case NEXTHDR_DEST: { | |
480 | u8 _opthdr[2], *opthdr; | |
481 | ||
482 | if (proto != htons(ETH_P_IPV6)) | |
483 | break; | |
484 | ||
485 | opthdr = __skb_header_pointer(skb, nhoff, sizeof(_opthdr), | |
486 | data, hlen, &_opthdr); | |
1e98a0f0 | 487 | if (!opthdr) |
a6e544b0 | 488 | goto out_bad; |
6a74fcf4 | 489 | |
1e98a0f0 ED |
490 | ip_proto = opthdr[0]; |
491 | nhoff += (opthdr[1] + 1) << 3; | |
6a74fcf4 TH |
492 | |
493 | goto ip_proto_again; | |
494 | } | |
b840f28b TH |
495 | case NEXTHDR_FRAGMENT: { |
496 | struct frag_hdr _fh, *fh; | |
497 | ||
498 | if (proto != htons(ETH_P_IPV6)) | |
499 | break; | |
500 | ||
501 | fh = __skb_header_pointer(skb, nhoff, sizeof(_fh), | |
502 | data, hlen, &_fh); | |
503 | ||
504 | if (!fh) | |
505 | goto out_bad; | |
506 | ||
4b36993d | 507 | key_control->flags |= FLOW_DIS_IS_FRAGMENT; |
b840f28b TH |
508 | |
509 | nhoff += sizeof(_fh); | |
43d2ccb3 | 510 | ip_proto = fh->nexthdr; |
b840f28b TH |
511 | |
512 | if (!(fh->frag_off & htons(IP6_OFFSET))) { | |
4b36993d | 513 | key_control->flags |= FLOW_DIS_FIRST_FRAG; |
43d2ccb3 | 514 | if (flags & FLOW_DISSECTOR_F_PARSE_1ST_FRAG) |
b840f28b | 515 | goto ip_proto_again; |
b840f28b TH |
516 | } |
517 | goto out_good; | |
518 | } | |
0744dd00 | 519 | case IPPROTO_IPIP: |
fca41895 | 520 | proto = htons(ETH_P_IP); |
823b9693 | 521 | |
4b36993d | 522 | key_control->flags |= FLOW_DIS_ENCAPSULATION; |
823b9693 TH |
523 | if (flags & FLOW_DISSECTOR_F_STOP_AT_ENCAP) |
524 | goto out_good; | |
525 | ||
fca41895 | 526 | goto ip; |
b438f940 TH |
527 | case IPPROTO_IPV6: |
528 | proto = htons(ETH_P_IPV6); | |
823b9693 | 529 | |
4b36993d | 530 | key_control->flags |= FLOW_DIS_ENCAPSULATION; |
823b9693 TH |
531 | if (flags & FLOW_DISSECTOR_F_STOP_AT_ENCAP) |
532 | goto out_good; | |
533 | ||
b438f940 | 534 | goto ipv6; |
b3baa0fb TH |
535 | case IPPROTO_MPLS: |
536 | proto = htons(ETH_P_MPLS_UC); | |
537 | goto mpls; | |
0744dd00 ED |
538 | default: |
539 | break; | |
540 | } | |
541 | ||
20a17bf6 DM |
542 | if (dissector_uses_key(flow_dissector, |
543 | FLOW_DISSECTOR_KEY_PORTS)) { | |
06635a35 JP |
544 | key_ports = skb_flow_dissector_target(flow_dissector, |
545 | FLOW_DISSECTOR_KEY_PORTS, | |
546 | target_container); | |
547 | key_ports->ports = __skb_flow_get_ports(skb, nhoff, ip_proto, | |
548 | data, hlen); | |
549 | } | |
5af7fb6e | 550 | |
a6e544b0 TH |
551 | out_good: |
552 | ret = true; | |
553 | ||
554 | out_bad: | |
555 | key_basic->n_proto = proto; | |
556 | key_basic->ip_proto = ip_proto; | |
557 | key_control->thoff = (u16)nhoff; | |
558 | ||
559 | return ret; | |
0744dd00 | 560 | } |
690e36e7 | 561 | EXPORT_SYMBOL(__skb_flow_dissect); |
441d9d32 CW |
562 | |
563 | static u32 hashrnd __read_mostly; | |
66415cf8 HFS |
564 | static __always_inline void __flow_hash_secret_init(void) |
565 | { | |
566 | net_get_random_once(&hashrnd, sizeof(hashrnd)); | |
567 | } | |
568 | ||
20a17bf6 DM |
569 | static __always_inline u32 __flow_hash_words(const u32 *words, u32 length, |
570 | u32 keyval) | |
42aecaa9 TH |
571 | { |
572 | return jhash2(words, length, keyval); | |
573 | } | |
574 | ||
20a17bf6 | 575 | static inline const u32 *flow_keys_hash_start(const struct flow_keys *flow) |
66415cf8 | 576 | { |
20a17bf6 DM |
577 | const void *p = flow; |
578 | ||
42aecaa9 | 579 | BUILD_BUG_ON(FLOW_KEYS_HASH_OFFSET % sizeof(u32)); |
20a17bf6 | 580 | return (const u32 *)(p + FLOW_KEYS_HASH_OFFSET); |
42aecaa9 TH |
581 | } |
582 | ||
20a17bf6 | 583 | static inline size_t flow_keys_hash_length(const struct flow_keys *flow) |
42aecaa9 | 584 | { |
c3f83241 | 585 | size_t diff = FLOW_KEYS_HASH_OFFSET + sizeof(flow->addrs); |
42aecaa9 | 586 | BUILD_BUG_ON((sizeof(*flow) - FLOW_KEYS_HASH_OFFSET) % sizeof(u32)); |
c3f83241 TH |
587 | BUILD_BUG_ON(offsetof(typeof(*flow), addrs) != |
588 | sizeof(*flow) - sizeof(flow->addrs)); | |
589 | ||
590 | switch (flow->control.addr_type) { | |
591 | case FLOW_DISSECTOR_KEY_IPV4_ADDRS: | |
592 | diff -= sizeof(flow->addrs.v4addrs); | |
593 | break; | |
594 | case FLOW_DISSECTOR_KEY_IPV6_ADDRS: | |
595 | diff -= sizeof(flow->addrs.v6addrs); | |
596 | break; | |
9f249089 TH |
597 | case FLOW_DISSECTOR_KEY_TIPC_ADDRS: |
598 | diff -= sizeof(flow->addrs.tipcaddrs); | |
599 | break; | |
c3f83241 TH |
600 | } |
601 | return (sizeof(*flow) - diff) / sizeof(u32); | |
602 | } | |
603 | ||
604 | __be32 flow_get_u32_src(const struct flow_keys *flow) | |
605 | { | |
606 | switch (flow->control.addr_type) { | |
607 | case FLOW_DISSECTOR_KEY_IPV4_ADDRS: | |
608 | return flow->addrs.v4addrs.src; | |
609 | case FLOW_DISSECTOR_KEY_IPV6_ADDRS: | |
610 | return (__force __be32)ipv6_addr_hash( | |
611 | &flow->addrs.v6addrs.src); | |
9f249089 TH |
612 | case FLOW_DISSECTOR_KEY_TIPC_ADDRS: |
613 | return flow->addrs.tipcaddrs.srcnode; | |
c3f83241 TH |
614 | default: |
615 | return 0; | |
616 | } | |
617 | } | |
618 | EXPORT_SYMBOL(flow_get_u32_src); | |
619 | ||
620 | __be32 flow_get_u32_dst(const struct flow_keys *flow) | |
621 | { | |
622 | switch (flow->control.addr_type) { | |
623 | case FLOW_DISSECTOR_KEY_IPV4_ADDRS: | |
624 | return flow->addrs.v4addrs.dst; | |
625 | case FLOW_DISSECTOR_KEY_IPV6_ADDRS: | |
626 | return (__force __be32)ipv6_addr_hash( | |
627 | &flow->addrs.v6addrs.dst); | |
628 | default: | |
629 | return 0; | |
630 | } | |
631 | } | |
632 | EXPORT_SYMBOL(flow_get_u32_dst); | |
633 | ||
634 | static inline void __flow_hash_consistentify(struct flow_keys *keys) | |
635 | { | |
636 | int addr_diff, i; | |
637 | ||
638 | switch (keys->control.addr_type) { | |
639 | case FLOW_DISSECTOR_KEY_IPV4_ADDRS: | |
640 | addr_diff = (__force u32)keys->addrs.v4addrs.dst - | |
641 | (__force u32)keys->addrs.v4addrs.src; | |
642 | if ((addr_diff < 0) || | |
643 | (addr_diff == 0 && | |
644 | ((__force u16)keys->ports.dst < | |
645 | (__force u16)keys->ports.src))) { | |
646 | swap(keys->addrs.v4addrs.src, keys->addrs.v4addrs.dst); | |
647 | swap(keys->ports.src, keys->ports.dst); | |
648 | } | |
649 | break; | |
650 | case FLOW_DISSECTOR_KEY_IPV6_ADDRS: | |
651 | addr_diff = memcmp(&keys->addrs.v6addrs.dst, | |
652 | &keys->addrs.v6addrs.src, | |
653 | sizeof(keys->addrs.v6addrs.dst)); | |
654 | if ((addr_diff < 0) || | |
655 | (addr_diff == 0 && | |
656 | ((__force u16)keys->ports.dst < | |
657 | (__force u16)keys->ports.src))) { | |
658 | for (i = 0; i < 4; i++) | |
659 | swap(keys->addrs.v6addrs.src.s6_addr32[i], | |
660 | keys->addrs.v6addrs.dst.s6_addr32[i]); | |
661 | swap(keys->ports.src, keys->ports.dst); | |
662 | } | |
663 | break; | |
664 | } | |
66415cf8 HFS |
665 | } |
666 | ||
50fb7992 | 667 | static inline u32 __flow_hash_from_keys(struct flow_keys *keys, u32 keyval) |
5ed20a68 TH |
668 | { |
669 | u32 hash; | |
670 | ||
c3f83241 | 671 | __flow_hash_consistentify(keys); |
5ed20a68 | 672 | |
20a17bf6 | 673 | hash = __flow_hash_words(flow_keys_hash_start(keys), |
42aecaa9 | 674 | flow_keys_hash_length(keys), keyval); |
5ed20a68 TH |
675 | if (!hash) |
676 | hash = 1; | |
677 | ||
678 | return hash; | |
679 | } | |
680 | ||
681 | u32 flow_hash_from_keys(struct flow_keys *keys) | |
682 | { | |
50fb7992 TH |
683 | __flow_hash_secret_init(); |
684 | return __flow_hash_from_keys(keys, hashrnd); | |
5ed20a68 TH |
685 | } |
686 | EXPORT_SYMBOL(flow_hash_from_keys); | |
687 | ||
50fb7992 TH |
688 | static inline u32 ___skb_get_hash(const struct sk_buff *skb, |
689 | struct flow_keys *keys, u32 keyval) | |
690 | { | |
6db61d79 TH |
691 | skb_flow_dissect_flow_keys(skb, keys, |
692 | FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL); | |
50fb7992 TH |
693 | |
694 | return __flow_hash_from_keys(keys, keyval); | |
695 | } | |
696 | ||
2f59e1eb TH |
697 | struct _flow_keys_digest_data { |
698 | __be16 n_proto; | |
699 | u8 ip_proto; | |
700 | u8 padding; | |
701 | __be32 ports; | |
702 | __be32 src; | |
703 | __be32 dst; | |
704 | }; | |
705 | ||
706 | void make_flow_keys_digest(struct flow_keys_digest *digest, | |
707 | const struct flow_keys *flow) | |
708 | { | |
709 | struct _flow_keys_digest_data *data = | |
710 | (struct _flow_keys_digest_data *)digest; | |
711 | ||
712 | BUILD_BUG_ON(sizeof(*data) > sizeof(*digest)); | |
713 | ||
714 | memset(digest, 0, sizeof(*digest)); | |
715 | ||
06635a35 JP |
716 | data->n_proto = flow->basic.n_proto; |
717 | data->ip_proto = flow->basic.ip_proto; | |
718 | data->ports = flow->ports.ports; | |
c3f83241 TH |
719 | data->src = flow->addrs.v4addrs.src; |
720 | data->dst = flow->addrs.v4addrs.dst; | |
2f59e1eb TH |
721 | } |
722 | EXPORT_SYMBOL(make_flow_keys_digest); | |
723 | ||
eb70db87 DM |
724 | static struct flow_dissector flow_keys_dissector_symmetric __read_mostly; |
725 | ||
726 | u32 __skb_get_hash_symmetric(struct sk_buff *skb) | |
727 | { | |
728 | struct flow_keys keys; | |
729 | ||
730 | __flow_hash_secret_init(); | |
731 | ||
732 | memset(&keys, 0, sizeof(keys)); | |
733 | __skb_flow_dissect(skb, &flow_keys_dissector_symmetric, &keys, | |
734 | NULL, 0, 0, 0, | |
735 | FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL); | |
736 | ||
737 | return __flow_hash_from_keys(&keys, hashrnd); | |
738 | } | |
739 | EXPORT_SYMBOL_GPL(__skb_get_hash_symmetric); | |
740 | ||
d4fd3275 JP |
741 | /** |
742 | * __skb_get_hash: calculate a flow hash | |
743 | * @skb: sk_buff to calculate flow hash from | |
744 | * | |
745 | * This function calculates a flow hash based on src/dst addresses | |
61b905da TH |
746 | * and src/dst port numbers. Sets hash in skb to non-zero hash value |
747 | * on success, zero indicates no valid hash. Also, sets l4_hash in skb | |
441d9d32 CW |
748 | * if hash is a canonical 4-tuple hash over transport ports. |
749 | */ | |
3958afa1 | 750 | void __skb_get_hash(struct sk_buff *skb) |
441d9d32 CW |
751 | { |
752 | struct flow_keys keys; | |
635c223c | 753 | u32 hash; |
441d9d32 | 754 | |
50fb7992 TH |
755 | __flow_hash_secret_init(); |
756 | ||
635c223c GF |
757 | hash = ___skb_get_hash(skb, &keys, hashrnd); |
758 | ||
759 | __skb_set_sw_hash(skb, hash, flow_keys_have_l4(&keys)); | |
441d9d32 | 760 | } |
3958afa1 | 761 | EXPORT_SYMBOL(__skb_get_hash); |
441d9d32 | 762 | |
50fb7992 TH |
763 | __u32 skb_get_hash_perturb(const struct sk_buff *skb, u32 perturb) |
764 | { | |
765 | struct flow_keys keys; | |
766 | ||
767 | return ___skb_get_hash(skb, &keys, perturb); | |
768 | } | |
769 | EXPORT_SYMBOL(skb_get_hash_perturb); | |
770 | ||
20a17bf6 | 771 | __u32 __skb_get_hash_flowi6(struct sk_buff *skb, const struct flowi6 *fl6) |
f70ea018 TH |
772 | { |
773 | struct flow_keys keys; | |
774 | ||
775 | memset(&keys, 0, sizeof(keys)); | |
776 | ||
777 | memcpy(&keys.addrs.v6addrs.src, &fl6->saddr, | |
778 | sizeof(keys.addrs.v6addrs.src)); | |
779 | memcpy(&keys.addrs.v6addrs.dst, &fl6->daddr, | |
780 | sizeof(keys.addrs.v6addrs.dst)); | |
781 | keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
782 | keys.ports.src = fl6->fl6_sport; | |
783 | keys.ports.dst = fl6->fl6_dport; | |
784 | keys.keyid.keyid = fl6->fl6_gre_key; | |
785 | keys.tags.flow_label = (__force u32)fl6->flowlabel; | |
786 | keys.basic.ip_proto = fl6->flowi6_proto; | |
787 | ||
bcc83839 TH |
788 | __skb_set_sw_hash(skb, flow_hash_from_keys(&keys), |
789 | flow_keys_have_l4(&keys)); | |
f70ea018 TH |
790 | |
791 | return skb->hash; | |
792 | } | |
793 | EXPORT_SYMBOL(__skb_get_hash_flowi6); | |
794 | ||
20a17bf6 | 795 | __u32 __skb_get_hash_flowi4(struct sk_buff *skb, const struct flowi4 *fl4) |
f70ea018 TH |
796 | { |
797 | struct flow_keys keys; | |
798 | ||
799 | memset(&keys, 0, sizeof(keys)); | |
800 | ||
801 | keys.addrs.v4addrs.src = fl4->saddr; | |
802 | keys.addrs.v4addrs.dst = fl4->daddr; | |
803 | keys.control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
804 | keys.ports.src = fl4->fl4_sport; | |
805 | keys.ports.dst = fl4->fl4_dport; | |
806 | keys.keyid.keyid = fl4->fl4_gre_key; | |
807 | keys.basic.ip_proto = fl4->flowi4_proto; | |
808 | ||
bcc83839 TH |
809 | __skb_set_sw_hash(skb, flow_hash_from_keys(&keys), |
810 | flow_keys_have_l4(&keys)); | |
f70ea018 TH |
811 | |
812 | return skb->hash; | |
813 | } | |
814 | EXPORT_SYMBOL(__skb_get_hash_flowi4); | |
815 | ||
56193d1b AD |
816 | u32 __skb_get_poff(const struct sk_buff *skb, void *data, |
817 | const struct flow_keys *keys, int hlen) | |
f77668dc | 818 | { |
42aecaa9 | 819 | u32 poff = keys->control.thoff; |
f77668dc | 820 | |
43d2ccb3 AD |
821 | /* skip L4 headers for fragments after the first */ |
822 | if ((keys->control.flags & FLOW_DIS_IS_FRAGMENT) && | |
823 | !(keys->control.flags & FLOW_DIS_FIRST_FRAG)) | |
824 | return poff; | |
825 | ||
06635a35 | 826 | switch (keys->basic.ip_proto) { |
f77668dc | 827 | case IPPROTO_TCP: { |
5af7fb6e AD |
828 | /* access doff as u8 to avoid unaligned access */ |
829 | const u8 *doff; | |
830 | u8 _doff; | |
f77668dc | 831 | |
5af7fb6e AD |
832 | doff = __skb_header_pointer(skb, poff + 12, sizeof(_doff), |
833 | data, hlen, &_doff); | |
834 | if (!doff) | |
f77668dc DB |
835 | return poff; |
836 | ||
5af7fb6e | 837 | poff += max_t(u32, sizeof(struct tcphdr), (*doff & 0xF0) >> 2); |
f77668dc DB |
838 | break; |
839 | } | |
840 | case IPPROTO_UDP: | |
841 | case IPPROTO_UDPLITE: | |
842 | poff += sizeof(struct udphdr); | |
843 | break; | |
844 | /* For the rest, we do not really care about header | |
845 | * extensions at this point for now. | |
846 | */ | |
847 | case IPPROTO_ICMP: | |
848 | poff += sizeof(struct icmphdr); | |
849 | break; | |
850 | case IPPROTO_ICMPV6: | |
851 | poff += sizeof(struct icmp6hdr); | |
852 | break; | |
853 | case IPPROTO_IGMP: | |
854 | poff += sizeof(struct igmphdr); | |
855 | break; | |
856 | case IPPROTO_DCCP: | |
857 | poff += sizeof(struct dccp_hdr); | |
858 | break; | |
859 | case IPPROTO_SCTP: | |
860 | poff += sizeof(struct sctphdr); | |
861 | break; | |
862 | } | |
863 | ||
864 | return poff; | |
865 | } | |
866 | ||
0db89b8b JP |
867 | /** |
868 | * skb_get_poff - get the offset to the payload | |
869 | * @skb: sk_buff to get the payload offset from | |
870 | * | |
871 | * The function will get the offset to the payload as far as it could | |
872 | * be dissected. The main user is currently BPF, so that we can dynamically | |
56193d1b AD |
873 | * truncate packets without needing to push actual payload to the user |
874 | * space and can analyze headers only, instead. | |
875 | */ | |
876 | u32 skb_get_poff(const struct sk_buff *skb) | |
877 | { | |
878 | struct flow_keys keys; | |
879 | ||
cd79a238 | 880 | if (!skb_flow_dissect_flow_keys(skb, &keys, 0)) |
56193d1b AD |
881 | return 0; |
882 | ||
883 | return __skb_get_poff(skb, skb->data, &keys, skb_headlen(skb)); | |
884 | } | |
06635a35 | 885 | |
20a17bf6 | 886 | __u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys) |
a17ace95 DM |
887 | { |
888 | memset(keys, 0, sizeof(*keys)); | |
889 | ||
890 | memcpy(&keys->addrs.v6addrs.src, &fl6->saddr, | |
891 | sizeof(keys->addrs.v6addrs.src)); | |
892 | memcpy(&keys->addrs.v6addrs.dst, &fl6->daddr, | |
893 | sizeof(keys->addrs.v6addrs.dst)); | |
894 | keys->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; | |
895 | keys->ports.src = fl6->fl6_sport; | |
896 | keys->ports.dst = fl6->fl6_dport; | |
897 | keys->keyid.keyid = fl6->fl6_gre_key; | |
898 | keys->tags.flow_label = (__force u32)fl6->flowlabel; | |
899 | keys->basic.ip_proto = fl6->flowi6_proto; | |
900 | ||
901 | return flow_hash_from_keys(keys); | |
902 | } | |
903 | EXPORT_SYMBOL(__get_hash_from_flowi6); | |
904 | ||
20a17bf6 | 905 | __u32 __get_hash_from_flowi4(const struct flowi4 *fl4, struct flow_keys *keys) |
a17ace95 DM |
906 | { |
907 | memset(keys, 0, sizeof(*keys)); | |
908 | ||
909 | keys->addrs.v4addrs.src = fl4->saddr; | |
910 | keys->addrs.v4addrs.dst = fl4->daddr; | |
911 | keys->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; | |
912 | keys->ports.src = fl4->fl4_sport; | |
913 | keys->ports.dst = fl4->fl4_dport; | |
914 | keys->keyid.keyid = fl4->fl4_gre_key; | |
915 | keys->basic.ip_proto = fl4->flowi4_proto; | |
916 | ||
917 | return flow_hash_from_keys(keys); | |
918 | } | |
919 | EXPORT_SYMBOL(__get_hash_from_flowi4); | |
920 | ||
06635a35 | 921 | static const struct flow_dissector_key flow_keys_dissector_keys[] = { |
42aecaa9 TH |
922 | { |
923 | .key_id = FLOW_DISSECTOR_KEY_CONTROL, | |
924 | .offset = offsetof(struct flow_keys, control), | |
925 | }, | |
06635a35 JP |
926 | { |
927 | .key_id = FLOW_DISSECTOR_KEY_BASIC, | |
928 | .offset = offsetof(struct flow_keys, basic), | |
929 | }, | |
930 | { | |
931 | .key_id = FLOW_DISSECTOR_KEY_IPV4_ADDRS, | |
c3f83241 TH |
932 | .offset = offsetof(struct flow_keys, addrs.v4addrs), |
933 | }, | |
934 | { | |
935 | .key_id = FLOW_DISSECTOR_KEY_IPV6_ADDRS, | |
936 | .offset = offsetof(struct flow_keys, addrs.v6addrs), | |
06635a35 | 937 | }, |
9f249089 TH |
938 | { |
939 | .key_id = FLOW_DISSECTOR_KEY_TIPC_ADDRS, | |
940 | .offset = offsetof(struct flow_keys, addrs.tipcaddrs), | |
941 | }, | |
06635a35 JP |
942 | { |
943 | .key_id = FLOW_DISSECTOR_KEY_PORTS, | |
944 | .offset = offsetof(struct flow_keys, ports), | |
945 | }, | |
d34af823 | 946 | { |
f6a66927 HHZ |
947 | .key_id = FLOW_DISSECTOR_KEY_VLAN, |
948 | .offset = offsetof(struct flow_keys, vlan), | |
d34af823 | 949 | }, |
87ee9e52 TH |
950 | { |
951 | .key_id = FLOW_DISSECTOR_KEY_FLOW_LABEL, | |
952 | .offset = offsetof(struct flow_keys, tags), | |
953 | }, | |
1fdd512c TH |
954 | { |
955 | .key_id = FLOW_DISSECTOR_KEY_GRE_KEYID, | |
956 | .offset = offsetof(struct flow_keys, keyid), | |
957 | }, | |
06635a35 JP |
958 | }; |
959 | ||
eb70db87 DM |
960 | static const struct flow_dissector_key flow_keys_dissector_symmetric_keys[] = { |
961 | { | |
962 | .key_id = FLOW_DISSECTOR_KEY_CONTROL, | |
963 | .offset = offsetof(struct flow_keys, control), | |
964 | }, | |
965 | { | |
966 | .key_id = FLOW_DISSECTOR_KEY_BASIC, | |
967 | .offset = offsetof(struct flow_keys, basic), | |
968 | }, | |
969 | { | |
970 | .key_id = FLOW_DISSECTOR_KEY_IPV4_ADDRS, | |
971 | .offset = offsetof(struct flow_keys, addrs.v4addrs), | |
972 | }, | |
973 | { | |
974 | .key_id = FLOW_DISSECTOR_KEY_IPV6_ADDRS, | |
975 | .offset = offsetof(struct flow_keys, addrs.v6addrs), | |
976 | }, | |
977 | { | |
978 | .key_id = FLOW_DISSECTOR_KEY_PORTS, | |
979 | .offset = offsetof(struct flow_keys, ports), | |
980 | }, | |
981 | }; | |
982 | ||
06635a35 | 983 | static const struct flow_dissector_key flow_keys_buf_dissector_keys[] = { |
42aecaa9 TH |
984 | { |
985 | .key_id = FLOW_DISSECTOR_KEY_CONTROL, | |
986 | .offset = offsetof(struct flow_keys, control), | |
987 | }, | |
06635a35 JP |
988 | { |
989 | .key_id = FLOW_DISSECTOR_KEY_BASIC, | |
990 | .offset = offsetof(struct flow_keys, basic), | |
991 | }, | |
992 | }; | |
993 | ||
994 | struct flow_dissector flow_keys_dissector __read_mostly; | |
995 | EXPORT_SYMBOL(flow_keys_dissector); | |
996 | ||
997 | struct flow_dissector flow_keys_buf_dissector __read_mostly; | |
998 | ||
999 | static int __init init_default_flow_dissectors(void) | |
1000 | { | |
1001 | skb_flow_dissector_init(&flow_keys_dissector, | |
1002 | flow_keys_dissector_keys, | |
1003 | ARRAY_SIZE(flow_keys_dissector_keys)); | |
eb70db87 DM |
1004 | skb_flow_dissector_init(&flow_keys_dissector_symmetric, |
1005 | flow_keys_dissector_symmetric_keys, | |
1006 | ARRAY_SIZE(flow_keys_dissector_symmetric_keys)); | |
06635a35 JP |
1007 | skb_flow_dissector_init(&flow_keys_buf_dissector, |
1008 | flow_keys_buf_dissector_keys, | |
1009 | ARRAY_SIZE(flow_keys_buf_dissector_keys)); | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | late_initcall_sync(init_default_flow_dissectors); |