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