Commit | Line | Data |
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ccb1352e | 1 | /* |
03f0d916 | 2 | * Copyright (c) 2007-2013 Nicira, Inc. |
ccb1352e JG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of version 2 of the GNU General Public | |
6 | * License as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
16 | * 02110-1301, USA | |
17 | */ | |
18 | ||
19 | #include "flow.h" | |
20 | #include "datapath.h" | |
21 | #include <linux/uaccess.h> | |
22 | #include <linux/netdevice.h> | |
23 | #include <linux/etherdevice.h> | |
24 | #include <linux/if_ether.h> | |
25 | #include <linux/if_vlan.h> | |
26 | #include <net/llc_pdu.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/jhash.h> | |
29 | #include <linux/jiffies.h> | |
30 | #include <linux/llc.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/in.h> | |
33 | #include <linux/rcupdate.h> | |
34 | #include <linux/if_arp.h> | |
ccb1352e JG |
35 | #include <linux/ip.h> |
36 | #include <linux/ipv6.h> | |
a175a723 | 37 | #include <linux/sctp.h> |
ccb1352e JG |
38 | #include <linux/tcp.h> |
39 | #include <linux/udp.h> | |
40 | #include <linux/icmp.h> | |
41 | #include <linux/icmpv6.h> | |
42 | #include <linux/rculist.h> | |
43 | #include <net/ip.h> | |
7d5437c7 | 44 | #include <net/ip_tunnels.h> |
ccb1352e JG |
45 | #include <net/ipv6.h> |
46 | #include <net/ndisc.h> | |
47 | ||
e6445719 | 48 | u64 ovs_flow_used_time(unsigned long flow_jiffies) |
03f0d916 | 49 | { |
e6445719 PS |
50 | struct timespec cur_ts; |
51 | u64 cur_ms, idle_ms; | |
03f0d916 | 52 | |
e6445719 PS |
53 | ktime_get_ts(&cur_ts); |
54 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
55 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
56 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
03f0d916 | 57 | |
e6445719 | 58 | return cur_ms - idle_ms; |
5828cd9a AZ |
59 | } |
60 | ||
df23e9f6 | 61 | #define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF)) |
03f0d916 | 62 | |
e6445719 | 63 | void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) |
03f0d916 | 64 | { |
df23e9f6 | 65 | __be16 tcp_flags = 0; |
03f0d916 | 66 | |
e6445719 PS |
67 | if ((flow->key.eth.type == htons(ETH_P_IP) || |
68 | flow->key.eth.type == htons(ETH_P_IPV6)) && | |
69 | flow->key.ip.proto == IPPROTO_TCP && | |
70 | likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { | |
df23e9f6 | 71 | tcp_flags = TCP_FLAGS_BE16(tcp_hdr(skb)); |
03f0d916 AZ |
72 | } |
73 | ||
e6445719 PS |
74 | spin_lock(&flow->lock); |
75 | flow->used = jiffies; | |
76 | flow->packet_count++; | |
77 | flow->byte_count += skb->len; | |
78 | flow->tcp_flags |= tcp_flags; | |
79 | spin_unlock(&flow->lock); | |
03f0d916 AZ |
80 | } |
81 | ||
ccb1352e JG |
82 | static int check_header(struct sk_buff *skb, int len) |
83 | { | |
84 | if (unlikely(skb->len < len)) | |
85 | return -EINVAL; | |
86 | if (unlikely(!pskb_may_pull(skb, len))) | |
87 | return -ENOMEM; | |
88 | return 0; | |
89 | } | |
90 | ||
91 | static bool arphdr_ok(struct sk_buff *skb) | |
92 | { | |
93 | return pskb_may_pull(skb, skb_network_offset(skb) + | |
94 | sizeof(struct arp_eth_header)); | |
95 | } | |
96 | ||
97 | static int check_iphdr(struct sk_buff *skb) | |
98 | { | |
99 | unsigned int nh_ofs = skb_network_offset(skb); | |
100 | unsigned int ip_len; | |
101 | int err; | |
102 | ||
103 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); | |
104 | if (unlikely(err)) | |
105 | return err; | |
106 | ||
107 | ip_len = ip_hdrlen(skb); | |
108 | if (unlikely(ip_len < sizeof(struct iphdr) || | |
109 | skb->len < nh_ofs + ip_len)) | |
110 | return -EINVAL; | |
111 | ||
112 | skb_set_transport_header(skb, nh_ofs + ip_len); | |
113 | return 0; | |
114 | } | |
115 | ||
116 | static bool tcphdr_ok(struct sk_buff *skb) | |
117 | { | |
118 | int th_ofs = skb_transport_offset(skb); | |
119 | int tcp_len; | |
120 | ||
121 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
122 | return false; | |
123 | ||
124 | tcp_len = tcp_hdrlen(skb); | |
125 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
126 | skb->len < th_ofs + tcp_len)) | |
127 | return false; | |
128 | ||
129 | return true; | |
130 | } | |
131 | ||
132 | static bool udphdr_ok(struct sk_buff *skb) | |
133 | { | |
134 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
135 | sizeof(struct udphdr)); | |
136 | } | |
137 | ||
a175a723 JS |
138 | static bool sctphdr_ok(struct sk_buff *skb) |
139 | { | |
140 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
141 | sizeof(struct sctphdr)); | |
142 | } | |
143 | ||
ccb1352e JG |
144 | static bool icmphdr_ok(struct sk_buff *skb) |
145 | { | |
146 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
147 | sizeof(struct icmphdr)); | |
148 | } | |
149 | ||
03f0d916 | 150 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e JG |
151 | { |
152 | unsigned int nh_ofs = skb_network_offset(skb); | |
153 | unsigned int nh_len; | |
154 | int payload_ofs; | |
155 | struct ipv6hdr *nh; | |
156 | uint8_t nexthdr; | |
157 | __be16 frag_off; | |
158 | int err; | |
159 | ||
ccb1352e JG |
160 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
161 | if (unlikely(err)) | |
162 | return err; | |
163 | ||
164 | nh = ipv6_hdr(skb); | |
165 | nexthdr = nh->nexthdr; | |
166 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
167 | ||
168 | key->ip.proto = NEXTHDR_NONE; | |
169 | key->ip.tos = ipv6_get_dsfield(nh); | |
170 | key->ip.ttl = nh->hop_limit; | |
171 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); | |
172 | key->ipv6.addr.src = nh->saddr; | |
173 | key->ipv6.addr.dst = nh->daddr; | |
174 | ||
175 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); | |
176 | if (unlikely(payload_ofs < 0)) | |
177 | return -EINVAL; | |
178 | ||
179 | if (frag_off) { | |
180 | if (frag_off & htons(~0x7)) | |
181 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
182 | else | |
183 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
184 | } | |
185 | ||
186 | nh_len = payload_ofs - nh_ofs; | |
187 | skb_set_transport_header(skb, nh_ofs + nh_len); | |
188 | key->ip.proto = nexthdr; | |
189 | return nh_len; | |
190 | } | |
191 | ||
192 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
193 | { | |
194 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
195 | sizeof(struct icmp6hdr)); | |
196 | } | |
197 | ||
ccb1352e JG |
198 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
199 | { | |
200 | struct qtag_prefix { | |
201 | __be16 eth_type; /* ETH_P_8021Q */ | |
202 | __be16 tci; | |
203 | }; | |
204 | struct qtag_prefix *qp; | |
205 | ||
206 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) | |
207 | return 0; | |
208 | ||
209 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + | |
210 | sizeof(__be16)))) | |
211 | return -ENOMEM; | |
212 | ||
213 | qp = (struct qtag_prefix *) skb->data; | |
214 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); | |
215 | __skb_pull(skb, sizeof(struct qtag_prefix)); | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
220 | static __be16 parse_ethertype(struct sk_buff *skb) | |
221 | { | |
222 | struct llc_snap_hdr { | |
223 | u8 dsap; /* Always 0xAA */ | |
224 | u8 ssap; /* Always 0xAA */ | |
225 | u8 ctrl; | |
226 | u8 oui[3]; | |
227 | __be16 ethertype; | |
228 | }; | |
229 | struct llc_snap_hdr *llc; | |
230 | __be16 proto; | |
231 | ||
232 | proto = *(__be16 *) skb->data; | |
233 | __skb_pull(skb, sizeof(__be16)); | |
234 | ||
e5c5d22e | 235 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
236 | return proto; |
237 | ||
238 | if (skb->len < sizeof(struct llc_snap_hdr)) | |
239 | return htons(ETH_P_802_2); | |
240 | ||
241 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) | |
242 | return htons(0); | |
243 | ||
244 | llc = (struct llc_snap_hdr *) skb->data; | |
245 | if (llc->dsap != LLC_SAP_SNAP || | |
246 | llc->ssap != LLC_SAP_SNAP || | |
247 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
248 | return htons(ETH_P_802_2); | |
249 | ||
250 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
17b682a0 | 251 | |
e5c5d22e | 252 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
17b682a0 RL |
253 | return llc->ethertype; |
254 | ||
255 | return htons(ETH_P_802_2); | |
ccb1352e JG |
256 | } |
257 | ||
258 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, | |
03f0d916 | 259 | int nh_len) |
ccb1352e JG |
260 | { |
261 | struct icmp6hdr *icmp = icmp6_hdr(skb); | |
ccb1352e JG |
262 | |
263 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
264 | * fields, so we need to store them in 16-bit network byte order. | |
265 | */ | |
266 | key->ipv6.tp.src = htons(icmp->icmp6_type); | |
267 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
ccb1352e JG |
268 | |
269 | if (icmp->icmp6_code == 0 && | |
270 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
271 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
272 | int icmp_len = skb->len - skb_transport_offset(skb); | |
273 | struct nd_msg *nd; | |
274 | int offset; | |
275 | ||
ccb1352e JG |
276 | /* In order to process neighbor discovery options, we need the |
277 | * entire packet. | |
278 | */ | |
279 | if (unlikely(icmp_len < sizeof(*nd))) | |
03f0d916 AZ |
280 | return 0; |
281 | ||
282 | if (unlikely(skb_linearize(skb))) | |
283 | return -ENOMEM; | |
ccb1352e JG |
284 | |
285 | nd = (struct nd_msg *)skb_transport_header(skb); | |
286 | key->ipv6.nd.target = nd->target; | |
ccb1352e JG |
287 | |
288 | icmp_len -= sizeof(*nd); | |
289 | offset = 0; | |
290 | while (icmp_len >= 8) { | |
291 | struct nd_opt_hdr *nd_opt = | |
292 | (struct nd_opt_hdr *)(nd->opt + offset); | |
293 | int opt_len = nd_opt->nd_opt_len * 8; | |
294 | ||
295 | if (unlikely(!opt_len || opt_len > icmp_len)) | |
03f0d916 | 296 | return 0; |
ccb1352e JG |
297 | |
298 | /* Store the link layer address if the appropriate | |
299 | * option is provided. It is considered an error if | |
300 | * the same link layer option is specified twice. | |
301 | */ | |
302 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR | |
303 | && opt_len == 8) { | |
304 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) | |
305 | goto invalid; | |
306 | memcpy(key->ipv6.nd.sll, | |
307 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
308 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR | |
309 | && opt_len == 8) { | |
310 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) | |
311 | goto invalid; | |
312 | memcpy(key->ipv6.nd.tll, | |
313 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
314 | } | |
315 | ||
316 | icmp_len -= opt_len; | |
317 | offset += opt_len; | |
318 | } | |
319 | } | |
320 | ||
03f0d916 | 321 | return 0; |
ccb1352e JG |
322 | |
323 | invalid: | |
324 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); | |
325 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
326 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
327 | ||
03f0d916 | 328 | return 0; |
ccb1352e JG |
329 | } |
330 | ||
331 | /** | |
332 | * ovs_flow_extract - extracts a flow key from an Ethernet frame. | |
333 | * @skb: sk_buff that contains the frame, with skb->data pointing to the | |
334 | * Ethernet header | |
335 | * @in_port: port number on which @skb was received. | |
336 | * @key: output flow key | |
ccb1352e JG |
337 | * |
338 | * The caller must ensure that skb->len >= ETH_HLEN. | |
339 | * | |
340 | * Returns 0 if successful, otherwise a negative errno value. | |
341 | * | |
342 | * Initializes @skb header pointers as follows: | |
343 | * | |
344 | * - skb->mac_header: the Ethernet header. | |
345 | * | |
346 | * - skb->network_header: just past the Ethernet header, or just past the | |
347 | * VLAN header, to the first byte of the Ethernet payload. | |
348 | * | |
34d94f21 | 349 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
ccb1352e JG |
350 | * on output, then just past the IP header, if one is present and |
351 | * of a correct length, otherwise the same as skb->network_header. | |
34d94f21 | 352 | * For other key->eth.type values it is left untouched. |
ccb1352e | 353 | */ |
03f0d916 | 354 | int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key) |
ccb1352e | 355 | { |
03f0d916 | 356 | int error; |
ccb1352e JG |
357 | struct ethhdr *eth; |
358 | ||
359 | memset(key, 0, sizeof(*key)); | |
360 | ||
361 | key->phy.priority = skb->priority; | |
7d5437c7 PS |
362 | if (OVS_CB(skb)->tun_key) |
363 | memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); | |
ccb1352e | 364 | key->phy.in_port = in_port; |
39c7caeb | 365 | key->phy.skb_mark = skb->mark; |
ccb1352e JG |
366 | |
367 | skb_reset_mac_header(skb); | |
368 | ||
369 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet | |
370 | * header in the linear data area. | |
371 | */ | |
372 | eth = eth_hdr(skb); | |
373 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); | |
374 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
375 | ||
376 | __skb_pull(skb, 2 * ETH_ALEN); | |
b34df5e8 PS |
377 | /* We are going to push all headers that we pull, so no need to |
378 | * update skb->csum here. | |
379 | */ | |
ccb1352e JG |
380 | |
381 | if (vlan_tx_tag_present(skb)) | |
382 | key->eth.tci = htons(skb->vlan_tci); | |
383 | else if (eth->h_proto == htons(ETH_P_8021Q)) | |
384 | if (unlikely(parse_vlan(skb, key))) | |
385 | return -ENOMEM; | |
386 | ||
387 | key->eth.type = parse_ethertype(skb); | |
388 | if (unlikely(key->eth.type == htons(0))) | |
389 | return -ENOMEM; | |
390 | ||
391 | skb_reset_network_header(skb); | |
392 | __skb_push(skb, skb->data - skb_mac_header(skb)); | |
393 | ||
394 | /* Network layer. */ | |
395 | if (key->eth.type == htons(ETH_P_IP)) { | |
396 | struct iphdr *nh; | |
397 | __be16 offset; | |
398 | ||
ccb1352e JG |
399 | error = check_iphdr(skb); |
400 | if (unlikely(error)) { | |
401 | if (error == -EINVAL) { | |
402 | skb->transport_header = skb->network_header; | |
403 | error = 0; | |
404 | } | |
03f0d916 | 405 | return error; |
ccb1352e JG |
406 | } |
407 | ||
408 | nh = ip_hdr(skb); | |
409 | key->ipv4.addr.src = nh->saddr; | |
410 | key->ipv4.addr.dst = nh->daddr; | |
411 | ||
412 | key->ip.proto = nh->protocol; | |
413 | key->ip.tos = nh->tos; | |
414 | key->ip.ttl = nh->ttl; | |
415 | ||
416 | offset = nh->frag_off & htons(IP_OFFSET); | |
417 | if (offset) { | |
418 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
03f0d916 | 419 | return 0; |
ccb1352e JG |
420 | } |
421 | if (nh->frag_off & htons(IP_MF) || | |
422 | skb_shinfo(skb)->gso_type & SKB_GSO_UDP) | |
423 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
424 | ||
425 | /* Transport layer. */ | |
426 | if (key->ip.proto == IPPROTO_TCP) { | |
ccb1352e JG |
427 | if (tcphdr_ok(skb)) { |
428 | struct tcphdr *tcp = tcp_hdr(skb); | |
429 | key->ipv4.tp.src = tcp->source; | |
430 | key->ipv4.tp.dst = tcp->dest; | |
5eb26b15 | 431 | key->ipv4.tp.flags = TCP_FLAGS_BE16(tcp); |
ccb1352e JG |
432 | } |
433 | } else if (key->ip.proto == IPPROTO_UDP) { | |
ccb1352e JG |
434 | if (udphdr_ok(skb)) { |
435 | struct udphdr *udp = udp_hdr(skb); | |
436 | key->ipv4.tp.src = udp->source; | |
437 | key->ipv4.tp.dst = udp->dest; | |
438 | } | |
a175a723 JS |
439 | } else if (key->ip.proto == IPPROTO_SCTP) { |
440 | if (sctphdr_ok(skb)) { | |
441 | struct sctphdr *sctp = sctp_hdr(skb); | |
442 | key->ipv4.tp.src = sctp->source; | |
443 | key->ipv4.tp.dst = sctp->dest; | |
444 | } | |
ccb1352e | 445 | } else if (key->ip.proto == IPPROTO_ICMP) { |
ccb1352e JG |
446 | if (icmphdr_ok(skb)) { |
447 | struct icmphdr *icmp = icmp_hdr(skb); | |
448 | /* The ICMP type and code fields use the 16-bit | |
449 | * transport port fields, so we need to store | |
450 | * them in 16-bit network byte order. */ | |
451 | key->ipv4.tp.src = htons(icmp->type); | |
452 | key->ipv4.tp.dst = htons(icmp->code); | |
453 | } | |
454 | } | |
455 | ||
c0618533 MM |
456 | } else if ((key->eth.type == htons(ETH_P_ARP) || |
457 | key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { | |
ccb1352e JG |
458 | struct arp_eth_header *arp; |
459 | ||
460 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
461 | ||
462 | if (arp->ar_hrd == htons(ARPHRD_ETHER) | |
463 | && arp->ar_pro == htons(ETH_P_IP) | |
464 | && arp->ar_hln == ETH_ALEN | |
465 | && arp->ar_pln == 4) { | |
466 | ||
467 | /* We only match on the lower 8 bits of the opcode. */ | |
468 | if (ntohs(arp->ar_op) <= 0xff) | |
469 | key->ip.proto = ntohs(arp->ar_op); | |
d04d3829 MM |
470 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
471 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
472 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
473 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
ccb1352e JG |
474 | } |
475 | } else if (key->eth.type == htons(ETH_P_IPV6)) { | |
476 | int nh_len; /* IPv6 Header + Extensions */ | |
477 | ||
03f0d916 | 478 | nh_len = parse_ipv6hdr(skb, key); |
ccb1352e | 479 | if (unlikely(nh_len < 0)) { |
03f0d916 | 480 | if (nh_len == -EINVAL) { |
ccb1352e | 481 | skb->transport_header = skb->network_header; |
03f0d916 AZ |
482 | error = 0; |
483 | } else { | |
ccb1352e | 484 | error = nh_len; |
03f0d916 AZ |
485 | } |
486 | return error; | |
ccb1352e JG |
487 | } |
488 | ||
489 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) | |
03f0d916 | 490 | return 0; |
ccb1352e JG |
491 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
492 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
493 | ||
494 | /* Transport layer. */ | |
495 | if (key->ip.proto == NEXTHDR_TCP) { | |
ccb1352e JG |
496 | if (tcphdr_ok(skb)) { |
497 | struct tcphdr *tcp = tcp_hdr(skb); | |
498 | key->ipv6.tp.src = tcp->source; | |
499 | key->ipv6.tp.dst = tcp->dest; | |
5eb26b15 | 500 | key->ipv6.tp.flags = TCP_FLAGS_BE16(tcp); |
ccb1352e JG |
501 | } |
502 | } else if (key->ip.proto == NEXTHDR_UDP) { | |
ccb1352e JG |
503 | if (udphdr_ok(skb)) { |
504 | struct udphdr *udp = udp_hdr(skb); | |
505 | key->ipv6.tp.src = udp->source; | |
506 | key->ipv6.tp.dst = udp->dest; | |
507 | } | |
a175a723 JS |
508 | } else if (key->ip.proto == NEXTHDR_SCTP) { |
509 | if (sctphdr_ok(skb)) { | |
510 | struct sctphdr *sctp = sctp_hdr(skb); | |
511 | key->ipv6.tp.src = sctp->source; | |
512 | key->ipv6.tp.dst = sctp->dest; | |
513 | } | |
ccb1352e | 514 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
ccb1352e | 515 | if (icmp6hdr_ok(skb)) { |
03f0d916 AZ |
516 | error = parse_icmpv6(skb, key, nh_len); |
517 | if (error) | |
518 | return error; | |
ccb1352e JG |
519 | } |
520 | } | |
521 | } | |
522 | ||
03f0d916 | 523 | return 0; |
ccb1352e | 524 | } |