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> |
e298e505 | 38 | #include <linux/smp.h> |
ccb1352e JG |
39 | #include <linux/tcp.h> |
40 | #include <linux/udp.h> | |
41 | #include <linux/icmp.h> | |
42 | #include <linux/icmpv6.h> | |
43 | #include <linux/rculist.h> | |
44 | #include <net/ip.h> | |
7d5437c7 | 45 | #include <net/ip_tunnels.h> |
ccb1352e JG |
46 | #include <net/ipv6.h> |
47 | #include <net/ndisc.h> | |
48 | ||
e6445719 | 49 | u64 ovs_flow_used_time(unsigned long flow_jiffies) |
03f0d916 | 50 | { |
e6445719 PS |
51 | struct timespec cur_ts; |
52 | u64 cur_ms, idle_ms; | |
03f0d916 | 53 | |
e6445719 PS |
54 | ktime_get_ts(&cur_ts); |
55 | idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); | |
56 | cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + | |
57 | cur_ts.tv_nsec / NSEC_PER_MSEC; | |
03f0d916 | 58 | |
e6445719 | 59 | return cur_ms - idle_ms; |
5828cd9a AZ |
60 | } |
61 | ||
df23e9f6 | 62 | #define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF)) |
03f0d916 | 63 | |
e298e505 | 64 | void ovs_flow_stats_update(struct sw_flow *flow, struct sk_buff *skb) |
03f0d916 | 65 | { |
e298e505 | 66 | struct flow_stats *stats; |
df23e9f6 | 67 | __be16 tcp_flags = 0; |
03f0d916 | 68 | |
e298e505 PS |
69 | if (!flow->stats.is_percpu) |
70 | stats = flow->stats.stat; | |
71 | else | |
72 | stats = this_cpu_ptr(flow->stats.cpu_stats); | |
73 | ||
e6445719 PS |
74 | if ((flow->key.eth.type == htons(ETH_P_IP) || |
75 | flow->key.eth.type == htons(ETH_P_IPV6)) && | |
04382a33 | 76 | flow->key.ip.frag != OVS_FRAG_TYPE_LATER && |
e6445719 PS |
77 | flow->key.ip.proto == IPPROTO_TCP && |
78 | likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { | |
df23e9f6 | 79 | tcp_flags = TCP_FLAGS_BE16(tcp_hdr(skb)); |
03f0d916 AZ |
80 | } |
81 | ||
e298e505 PS |
82 | spin_lock(&stats->lock); |
83 | stats->used = jiffies; | |
84 | stats->packet_count++; | |
85 | stats->byte_count += skb->len; | |
86 | stats->tcp_flags |= tcp_flags; | |
87 | spin_unlock(&stats->lock); | |
88 | } | |
89 | ||
90 | static void stats_read(struct flow_stats *stats, | |
91 | struct ovs_flow_stats *ovs_stats, | |
92 | unsigned long *used, __be16 *tcp_flags) | |
93 | { | |
94 | spin_lock(&stats->lock); | |
f9b8c4c8 | 95 | if (!*used || time_after(stats->used, *used)) |
e298e505 PS |
96 | *used = stats->used; |
97 | *tcp_flags |= stats->tcp_flags; | |
98 | ovs_stats->n_packets += stats->packet_count; | |
99 | ovs_stats->n_bytes += stats->byte_count; | |
100 | spin_unlock(&stats->lock); | |
101 | } | |
102 | ||
103 | void ovs_flow_stats_get(struct sw_flow *flow, struct ovs_flow_stats *ovs_stats, | |
104 | unsigned long *used, __be16 *tcp_flags) | |
105 | { | |
4f647e0a | 106 | int cpu; |
e298e505 PS |
107 | |
108 | *used = 0; | |
109 | *tcp_flags = 0; | |
110 | memset(ovs_stats, 0, sizeof(*ovs_stats)); | |
111 | ||
4f647e0a | 112 | local_bh_disable(); |
e298e505 PS |
113 | if (!flow->stats.is_percpu) { |
114 | stats_read(flow->stats.stat, ovs_stats, used, tcp_flags); | |
115 | } else { | |
e298e505 PS |
116 | for_each_possible_cpu(cpu) { |
117 | struct flow_stats *stats; | |
118 | ||
e298e505 PS |
119 | stats = per_cpu_ptr(flow->stats.cpu_stats, cpu); |
120 | stats_read(stats, ovs_stats, used, tcp_flags); | |
e298e505 | 121 | } |
e298e505 | 122 | } |
4f647e0a | 123 | local_bh_enable(); |
e298e505 PS |
124 | } |
125 | ||
126 | static void stats_reset(struct flow_stats *stats) | |
127 | { | |
128 | spin_lock(&stats->lock); | |
129 | stats->used = 0; | |
130 | stats->packet_count = 0; | |
131 | stats->byte_count = 0; | |
132 | stats->tcp_flags = 0; | |
133 | spin_unlock(&stats->lock); | |
134 | } | |
135 | ||
136 | void ovs_flow_stats_clear(struct sw_flow *flow) | |
137 | { | |
4f647e0a | 138 | int cpu; |
e298e505 | 139 | |
4f647e0a | 140 | local_bh_disable(); |
e298e505 PS |
141 | if (!flow->stats.is_percpu) { |
142 | stats_reset(flow->stats.stat); | |
143 | } else { | |
e298e505 | 144 | for_each_possible_cpu(cpu) { |
e298e505 | 145 | stats_reset(per_cpu_ptr(flow->stats.cpu_stats, cpu)); |
e298e505 | 146 | } |
e298e505 | 147 | } |
4f647e0a | 148 | local_bh_enable(); |
03f0d916 AZ |
149 | } |
150 | ||
ccb1352e JG |
151 | static int check_header(struct sk_buff *skb, int len) |
152 | { | |
153 | if (unlikely(skb->len < len)) | |
154 | return -EINVAL; | |
155 | if (unlikely(!pskb_may_pull(skb, len))) | |
156 | return -ENOMEM; | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static bool arphdr_ok(struct sk_buff *skb) | |
161 | { | |
162 | return pskb_may_pull(skb, skb_network_offset(skb) + | |
163 | sizeof(struct arp_eth_header)); | |
164 | } | |
165 | ||
166 | static int check_iphdr(struct sk_buff *skb) | |
167 | { | |
168 | unsigned int nh_ofs = skb_network_offset(skb); | |
169 | unsigned int ip_len; | |
170 | int err; | |
171 | ||
172 | err = check_header(skb, nh_ofs + sizeof(struct iphdr)); | |
173 | if (unlikely(err)) | |
174 | return err; | |
175 | ||
176 | ip_len = ip_hdrlen(skb); | |
177 | if (unlikely(ip_len < sizeof(struct iphdr) || | |
178 | skb->len < nh_ofs + ip_len)) | |
179 | return -EINVAL; | |
180 | ||
181 | skb_set_transport_header(skb, nh_ofs + ip_len); | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static bool tcphdr_ok(struct sk_buff *skb) | |
186 | { | |
187 | int th_ofs = skb_transport_offset(skb); | |
188 | int tcp_len; | |
189 | ||
190 | if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) | |
191 | return false; | |
192 | ||
193 | tcp_len = tcp_hdrlen(skb); | |
194 | if (unlikely(tcp_len < sizeof(struct tcphdr) || | |
195 | skb->len < th_ofs + tcp_len)) | |
196 | return false; | |
197 | ||
198 | return true; | |
199 | } | |
200 | ||
201 | static bool udphdr_ok(struct sk_buff *skb) | |
202 | { | |
203 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
204 | sizeof(struct udphdr)); | |
205 | } | |
206 | ||
a175a723 JS |
207 | static bool sctphdr_ok(struct sk_buff *skb) |
208 | { | |
209 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
210 | sizeof(struct sctphdr)); | |
211 | } | |
212 | ||
ccb1352e JG |
213 | static bool icmphdr_ok(struct sk_buff *skb) |
214 | { | |
215 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
216 | sizeof(struct icmphdr)); | |
217 | } | |
218 | ||
03f0d916 | 219 | static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) |
ccb1352e JG |
220 | { |
221 | unsigned int nh_ofs = skb_network_offset(skb); | |
222 | unsigned int nh_len; | |
223 | int payload_ofs; | |
224 | struct ipv6hdr *nh; | |
225 | uint8_t nexthdr; | |
226 | __be16 frag_off; | |
227 | int err; | |
228 | ||
ccb1352e JG |
229 | err = check_header(skb, nh_ofs + sizeof(*nh)); |
230 | if (unlikely(err)) | |
231 | return err; | |
232 | ||
233 | nh = ipv6_hdr(skb); | |
234 | nexthdr = nh->nexthdr; | |
235 | payload_ofs = (u8 *)(nh + 1) - skb->data; | |
236 | ||
237 | key->ip.proto = NEXTHDR_NONE; | |
238 | key->ip.tos = ipv6_get_dsfield(nh); | |
239 | key->ip.ttl = nh->hop_limit; | |
240 | key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); | |
241 | key->ipv6.addr.src = nh->saddr; | |
242 | key->ipv6.addr.dst = nh->daddr; | |
243 | ||
244 | payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); | |
245 | if (unlikely(payload_ofs < 0)) | |
246 | return -EINVAL; | |
247 | ||
248 | if (frag_off) { | |
249 | if (frag_off & htons(~0x7)) | |
250 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
251 | else | |
252 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
253 | } | |
254 | ||
255 | nh_len = payload_ofs - nh_ofs; | |
256 | skb_set_transport_header(skb, nh_ofs + nh_len); | |
257 | key->ip.proto = nexthdr; | |
258 | return nh_len; | |
259 | } | |
260 | ||
261 | static bool icmp6hdr_ok(struct sk_buff *skb) | |
262 | { | |
263 | return pskb_may_pull(skb, skb_transport_offset(skb) + | |
264 | sizeof(struct icmp6hdr)); | |
265 | } | |
266 | ||
ccb1352e JG |
267 | static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) |
268 | { | |
269 | struct qtag_prefix { | |
270 | __be16 eth_type; /* ETH_P_8021Q */ | |
271 | __be16 tci; | |
272 | }; | |
273 | struct qtag_prefix *qp; | |
274 | ||
275 | if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) | |
276 | return 0; | |
277 | ||
278 | if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + | |
279 | sizeof(__be16)))) | |
280 | return -ENOMEM; | |
281 | ||
282 | qp = (struct qtag_prefix *) skb->data; | |
283 | key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); | |
284 | __skb_pull(skb, sizeof(struct qtag_prefix)); | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | static __be16 parse_ethertype(struct sk_buff *skb) | |
290 | { | |
291 | struct llc_snap_hdr { | |
292 | u8 dsap; /* Always 0xAA */ | |
293 | u8 ssap; /* Always 0xAA */ | |
294 | u8 ctrl; | |
295 | u8 oui[3]; | |
296 | __be16 ethertype; | |
297 | }; | |
298 | struct llc_snap_hdr *llc; | |
299 | __be16 proto; | |
300 | ||
301 | proto = *(__be16 *) skb->data; | |
302 | __skb_pull(skb, sizeof(__be16)); | |
303 | ||
e5c5d22e | 304 | if (ntohs(proto) >= ETH_P_802_3_MIN) |
ccb1352e JG |
305 | return proto; |
306 | ||
307 | if (skb->len < sizeof(struct llc_snap_hdr)) | |
308 | return htons(ETH_P_802_2); | |
309 | ||
310 | if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) | |
311 | return htons(0); | |
312 | ||
313 | llc = (struct llc_snap_hdr *) skb->data; | |
314 | if (llc->dsap != LLC_SAP_SNAP || | |
315 | llc->ssap != LLC_SAP_SNAP || | |
316 | (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) | |
317 | return htons(ETH_P_802_2); | |
318 | ||
319 | __skb_pull(skb, sizeof(struct llc_snap_hdr)); | |
17b682a0 | 320 | |
e5c5d22e | 321 | if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) |
17b682a0 RL |
322 | return llc->ethertype; |
323 | ||
324 | return htons(ETH_P_802_2); | |
ccb1352e JG |
325 | } |
326 | ||
327 | static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, | |
03f0d916 | 328 | int nh_len) |
ccb1352e JG |
329 | { |
330 | struct icmp6hdr *icmp = icmp6_hdr(skb); | |
ccb1352e JG |
331 | |
332 | /* The ICMPv6 type and code fields use the 16-bit transport port | |
333 | * fields, so we need to store them in 16-bit network byte order. | |
334 | */ | |
335 | key->ipv6.tp.src = htons(icmp->icmp6_type); | |
336 | key->ipv6.tp.dst = htons(icmp->icmp6_code); | |
ccb1352e JG |
337 | |
338 | if (icmp->icmp6_code == 0 && | |
339 | (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || | |
340 | icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { | |
341 | int icmp_len = skb->len - skb_transport_offset(skb); | |
342 | struct nd_msg *nd; | |
343 | int offset; | |
344 | ||
ccb1352e JG |
345 | /* In order to process neighbor discovery options, we need the |
346 | * entire packet. | |
347 | */ | |
348 | if (unlikely(icmp_len < sizeof(*nd))) | |
03f0d916 AZ |
349 | return 0; |
350 | ||
351 | if (unlikely(skb_linearize(skb))) | |
352 | return -ENOMEM; | |
ccb1352e JG |
353 | |
354 | nd = (struct nd_msg *)skb_transport_header(skb); | |
355 | key->ipv6.nd.target = nd->target; | |
ccb1352e JG |
356 | |
357 | icmp_len -= sizeof(*nd); | |
358 | offset = 0; | |
359 | while (icmp_len >= 8) { | |
360 | struct nd_opt_hdr *nd_opt = | |
361 | (struct nd_opt_hdr *)(nd->opt + offset); | |
362 | int opt_len = nd_opt->nd_opt_len * 8; | |
363 | ||
364 | if (unlikely(!opt_len || opt_len > icmp_len)) | |
03f0d916 | 365 | return 0; |
ccb1352e JG |
366 | |
367 | /* Store the link layer address if the appropriate | |
368 | * option is provided. It is considered an error if | |
369 | * the same link layer option is specified twice. | |
370 | */ | |
371 | if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR | |
372 | && opt_len == 8) { | |
373 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) | |
374 | goto invalid; | |
375 | memcpy(key->ipv6.nd.sll, | |
376 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
377 | } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR | |
378 | && opt_len == 8) { | |
379 | if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) | |
380 | goto invalid; | |
381 | memcpy(key->ipv6.nd.tll, | |
382 | &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); | |
383 | } | |
384 | ||
385 | icmp_len -= opt_len; | |
386 | offset += opt_len; | |
387 | } | |
388 | } | |
389 | ||
03f0d916 | 390 | return 0; |
ccb1352e JG |
391 | |
392 | invalid: | |
393 | memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); | |
394 | memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); | |
395 | memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); | |
396 | ||
03f0d916 | 397 | return 0; |
ccb1352e JG |
398 | } |
399 | ||
400 | /** | |
401 | * ovs_flow_extract - extracts a flow key from an Ethernet frame. | |
402 | * @skb: sk_buff that contains the frame, with skb->data pointing to the | |
403 | * Ethernet header | |
404 | * @in_port: port number on which @skb was received. | |
405 | * @key: output flow key | |
ccb1352e JG |
406 | * |
407 | * The caller must ensure that skb->len >= ETH_HLEN. | |
408 | * | |
409 | * Returns 0 if successful, otherwise a negative errno value. | |
410 | * | |
411 | * Initializes @skb header pointers as follows: | |
412 | * | |
413 | * - skb->mac_header: the Ethernet header. | |
414 | * | |
415 | * - skb->network_header: just past the Ethernet header, or just past the | |
416 | * VLAN header, to the first byte of the Ethernet payload. | |
417 | * | |
34d94f21 | 418 | * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 |
ccb1352e JG |
419 | * on output, then just past the IP header, if one is present and |
420 | * of a correct length, otherwise the same as skb->network_header. | |
34d94f21 | 421 | * For other key->eth.type values it is left untouched. |
ccb1352e | 422 | */ |
03f0d916 | 423 | int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key) |
ccb1352e | 424 | { |
03f0d916 | 425 | int error; |
ccb1352e JG |
426 | struct ethhdr *eth; |
427 | ||
428 | memset(key, 0, sizeof(*key)); | |
429 | ||
430 | key->phy.priority = skb->priority; | |
7d5437c7 PS |
431 | if (OVS_CB(skb)->tun_key) |
432 | memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); | |
ccb1352e | 433 | key->phy.in_port = in_port; |
39c7caeb | 434 | key->phy.skb_mark = skb->mark; |
ccb1352e JG |
435 | |
436 | skb_reset_mac_header(skb); | |
437 | ||
438 | /* Link layer. We are guaranteed to have at least the 14 byte Ethernet | |
439 | * header in the linear data area. | |
440 | */ | |
441 | eth = eth_hdr(skb); | |
442 | memcpy(key->eth.src, eth->h_source, ETH_ALEN); | |
443 | memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); | |
444 | ||
445 | __skb_pull(skb, 2 * ETH_ALEN); | |
b34df5e8 PS |
446 | /* We are going to push all headers that we pull, so no need to |
447 | * update skb->csum here. | |
448 | */ | |
ccb1352e JG |
449 | |
450 | if (vlan_tx_tag_present(skb)) | |
451 | key->eth.tci = htons(skb->vlan_tci); | |
452 | else if (eth->h_proto == htons(ETH_P_8021Q)) | |
453 | if (unlikely(parse_vlan(skb, key))) | |
454 | return -ENOMEM; | |
455 | ||
456 | key->eth.type = parse_ethertype(skb); | |
457 | if (unlikely(key->eth.type == htons(0))) | |
458 | return -ENOMEM; | |
459 | ||
460 | skb_reset_network_header(skb); | |
461 | __skb_push(skb, skb->data - skb_mac_header(skb)); | |
462 | ||
463 | /* Network layer. */ | |
464 | if (key->eth.type == htons(ETH_P_IP)) { | |
465 | struct iphdr *nh; | |
466 | __be16 offset; | |
467 | ||
ccb1352e JG |
468 | error = check_iphdr(skb); |
469 | if (unlikely(error)) { | |
470 | if (error == -EINVAL) { | |
471 | skb->transport_header = skb->network_header; | |
472 | error = 0; | |
473 | } | |
03f0d916 | 474 | return error; |
ccb1352e JG |
475 | } |
476 | ||
477 | nh = ip_hdr(skb); | |
478 | key->ipv4.addr.src = nh->saddr; | |
479 | key->ipv4.addr.dst = nh->daddr; | |
480 | ||
481 | key->ip.proto = nh->protocol; | |
482 | key->ip.tos = nh->tos; | |
483 | key->ip.ttl = nh->ttl; | |
484 | ||
485 | offset = nh->frag_off & htons(IP_OFFSET); | |
486 | if (offset) { | |
487 | key->ip.frag = OVS_FRAG_TYPE_LATER; | |
03f0d916 | 488 | return 0; |
ccb1352e JG |
489 | } |
490 | if (nh->frag_off & htons(IP_MF) || | |
491 | 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 == IPPROTO_TCP) { | |
ccb1352e JG |
496 | if (tcphdr_ok(skb)) { |
497 | struct tcphdr *tcp = tcp_hdr(skb); | |
498 | key->ipv4.tp.src = tcp->source; | |
499 | key->ipv4.tp.dst = tcp->dest; | |
5eb26b15 | 500 | key->ipv4.tp.flags = TCP_FLAGS_BE16(tcp); |
ccb1352e JG |
501 | } |
502 | } else if (key->ip.proto == IPPROTO_UDP) { | |
ccb1352e JG |
503 | if (udphdr_ok(skb)) { |
504 | struct udphdr *udp = udp_hdr(skb); | |
505 | key->ipv4.tp.src = udp->source; | |
506 | key->ipv4.tp.dst = udp->dest; | |
507 | } | |
a175a723 JS |
508 | } else if (key->ip.proto == IPPROTO_SCTP) { |
509 | if (sctphdr_ok(skb)) { | |
510 | struct sctphdr *sctp = sctp_hdr(skb); | |
511 | key->ipv4.tp.src = sctp->source; | |
512 | key->ipv4.tp.dst = sctp->dest; | |
513 | } | |
ccb1352e | 514 | } else if (key->ip.proto == IPPROTO_ICMP) { |
ccb1352e JG |
515 | if (icmphdr_ok(skb)) { |
516 | struct icmphdr *icmp = icmp_hdr(skb); | |
517 | /* The ICMP type and code fields use the 16-bit | |
518 | * transport port fields, so we need to store | |
519 | * them in 16-bit network byte order. */ | |
520 | key->ipv4.tp.src = htons(icmp->type); | |
521 | key->ipv4.tp.dst = htons(icmp->code); | |
522 | } | |
523 | } | |
524 | ||
c0618533 MM |
525 | } else if ((key->eth.type == htons(ETH_P_ARP) || |
526 | key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { | |
ccb1352e JG |
527 | struct arp_eth_header *arp; |
528 | ||
529 | arp = (struct arp_eth_header *)skb_network_header(skb); | |
530 | ||
531 | if (arp->ar_hrd == htons(ARPHRD_ETHER) | |
532 | && arp->ar_pro == htons(ETH_P_IP) | |
533 | && arp->ar_hln == ETH_ALEN | |
534 | && arp->ar_pln == 4) { | |
535 | ||
536 | /* We only match on the lower 8 bits of the opcode. */ | |
537 | if (ntohs(arp->ar_op) <= 0xff) | |
538 | key->ip.proto = ntohs(arp->ar_op); | |
d04d3829 MM |
539 | memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); |
540 | memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); | |
541 | memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); | |
542 | memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); | |
ccb1352e JG |
543 | } |
544 | } else if (key->eth.type == htons(ETH_P_IPV6)) { | |
545 | int nh_len; /* IPv6 Header + Extensions */ | |
546 | ||
03f0d916 | 547 | nh_len = parse_ipv6hdr(skb, key); |
ccb1352e | 548 | if (unlikely(nh_len < 0)) { |
03f0d916 | 549 | if (nh_len == -EINVAL) { |
ccb1352e | 550 | skb->transport_header = skb->network_header; |
03f0d916 AZ |
551 | error = 0; |
552 | } else { | |
ccb1352e | 553 | error = nh_len; |
03f0d916 AZ |
554 | } |
555 | return error; | |
ccb1352e JG |
556 | } |
557 | ||
558 | if (key->ip.frag == OVS_FRAG_TYPE_LATER) | |
03f0d916 | 559 | return 0; |
ccb1352e JG |
560 | if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) |
561 | key->ip.frag = OVS_FRAG_TYPE_FIRST; | |
562 | ||
563 | /* Transport layer. */ | |
564 | if (key->ip.proto == NEXTHDR_TCP) { | |
ccb1352e JG |
565 | if (tcphdr_ok(skb)) { |
566 | struct tcphdr *tcp = tcp_hdr(skb); | |
567 | key->ipv6.tp.src = tcp->source; | |
568 | key->ipv6.tp.dst = tcp->dest; | |
5eb26b15 | 569 | key->ipv6.tp.flags = TCP_FLAGS_BE16(tcp); |
ccb1352e JG |
570 | } |
571 | } else if (key->ip.proto == NEXTHDR_UDP) { | |
ccb1352e JG |
572 | if (udphdr_ok(skb)) { |
573 | struct udphdr *udp = udp_hdr(skb); | |
574 | key->ipv6.tp.src = udp->source; | |
575 | key->ipv6.tp.dst = udp->dest; | |
576 | } | |
a175a723 JS |
577 | } else if (key->ip.proto == NEXTHDR_SCTP) { |
578 | if (sctphdr_ok(skb)) { | |
579 | struct sctphdr *sctp = sctp_hdr(skb); | |
580 | key->ipv6.tp.src = sctp->source; | |
581 | key->ipv6.tp.dst = sctp->dest; | |
582 | } | |
ccb1352e | 583 | } else if (key->ip.proto == NEXTHDR_ICMP) { |
ccb1352e | 584 | if (icmp6hdr_ok(skb)) { |
03f0d916 AZ |
585 | error = parse_icmpv6(skb, key, nh_len); |
586 | if (error) | |
587 | return error; | |
ccb1352e JG |
588 | } |
589 | } | |
590 | } | |
591 | ||
03f0d916 | 592 | return 0; |
ccb1352e | 593 | } |