2011-10-26 04:26:31 +02:00
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/*
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2013-08-08 05:01:00 +02:00
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* Copyright (c) 2007-2013 Nicira, Inc.
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2011-10-26 04:26:31 +02:00
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#include "flow.h"
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#include "datapath.h"
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#include <linux/uaccess.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <net/llc_pdu.h>
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#include <linux/kernel.h>
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#include <linux/jhash.h>
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#include <linux/jiffies.h>
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#include <linux/llc.h>
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#include <linux/module.h>
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#include <linux/in.h>
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#include <linux/rcupdate.h>
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#include <linux/if_arp.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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2013-08-22 21:30:48 +02:00
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#include <linux/sctp.h>
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2013-10-30 01:22:21 +01:00
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#include <linux/smp.h>
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2011-10-26 04:26:31 +02:00
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#include <linux/icmp.h>
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#include <linux/icmpv6.h>
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#include <linux/rculist.h>
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#include <net/ip.h>
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2013-06-18 02:50:18 +02:00
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#include <net/ip_tunnels.h>
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2011-10-26 04:26:31 +02:00
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#include <net/ipv6.h>
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#include <net/ndisc.h>
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2013-10-04 03:16:47 +02:00
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u64 ovs_flow_used_time(unsigned long flow_jiffies)
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2013-08-08 05:01:00 +02:00
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{
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2013-10-04 03:16:47 +02:00
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struct timespec cur_ts;
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u64 cur_ms, idle_ms;
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2013-08-08 05:01:00 +02:00
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2013-10-04 03:16:47 +02:00
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ktime_get_ts(&cur_ts);
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idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
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cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
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cur_ts.tv_nsec / NSEC_PER_MSEC;
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2013-08-08 05:01:00 +02:00
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2013-10-04 03:16:47 +02:00
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return cur_ms - idle_ms;
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2013-08-27 22:02:21 +02:00
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}
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2013-10-23 10:40:44 +02:00
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#define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF))
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2013-08-08 05:01:00 +02:00
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2013-10-30 01:22:21 +01:00
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void ovs_flow_stats_update(struct sw_flow *flow, struct sk_buff *skb)
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2013-08-08 05:01:00 +02:00
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{
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2013-10-30 01:22:21 +01:00
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struct flow_stats *stats;
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2013-10-23 10:40:44 +02:00
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__be16 tcp_flags = 0;
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2013-08-08 05:01:00 +02:00
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2013-10-30 01:22:21 +01:00
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if (!flow->stats.is_percpu)
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stats = flow->stats.stat;
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else
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stats = this_cpu_ptr(flow->stats.cpu_stats);
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2013-10-04 03:16:47 +02:00
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if ((flow->key.eth.type == htons(ETH_P_IP) ||
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flow->key.eth.type == htons(ETH_P_IPV6)) &&
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2014-02-16 02:37:45 +01:00
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flow->key.ip.frag != OVS_FRAG_TYPE_LATER &&
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2013-10-04 03:16:47 +02:00
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flow->key.ip.proto == IPPROTO_TCP &&
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likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
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2013-10-23 10:40:44 +02:00
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tcp_flags = TCP_FLAGS_BE16(tcp_hdr(skb));
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2013-08-08 05:01:00 +02:00
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}
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2013-10-30 01:22:21 +01:00
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spin_lock(&stats->lock);
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stats->used = jiffies;
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stats->packet_count++;
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stats->byte_count += skb->len;
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stats->tcp_flags |= tcp_flags;
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spin_unlock(&stats->lock);
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}
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static void stats_read(struct flow_stats *stats,
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struct ovs_flow_stats *ovs_stats,
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unsigned long *used, __be16 *tcp_flags)
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{
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spin_lock(&stats->lock);
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2014-03-20 18:45:21 +01:00
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if (!*used || time_after(stats->used, *used))
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2013-10-30 01:22:21 +01:00
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*used = stats->used;
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*tcp_flags |= stats->tcp_flags;
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ovs_stats->n_packets += stats->packet_count;
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ovs_stats->n_bytes += stats->byte_count;
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spin_unlock(&stats->lock);
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}
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void ovs_flow_stats_get(struct sw_flow *flow, struct ovs_flow_stats *ovs_stats,
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unsigned long *used, __be16 *tcp_flags)
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{
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2014-03-27 15:05:34 +01:00
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int cpu;
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2013-10-30 01:22:21 +01:00
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*used = 0;
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*tcp_flags = 0;
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memset(ovs_stats, 0, sizeof(*ovs_stats));
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2014-03-27 15:05:34 +01:00
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local_bh_disable();
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2013-10-30 01:22:21 +01:00
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if (!flow->stats.is_percpu) {
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stats_read(flow->stats.stat, ovs_stats, used, tcp_flags);
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} else {
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for_each_possible_cpu(cpu) {
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struct flow_stats *stats;
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stats = per_cpu_ptr(flow->stats.cpu_stats, cpu);
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stats_read(stats, ovs_stats, used, tcp_flags);
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}
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}
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2014-03-27 15:05:34 +01:00
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local_bh_enable();
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2013-10-30 01:22:21 +01:00
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}
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static void stats_reset(struct flow_stats *stats)
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{
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spin_lock(&stats->lock);
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stats->used = 0;
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stats->packet_count = 0;
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stats->byte_count = 0;
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stats->tcp_flags = 0;
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spin_unlock(&stats->lock);
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}
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void ovs_flow_stats_clear(struct sw_flow *flow)
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{
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2014-03-27 15:05:34 +01:00
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int cpu;
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2013-10-30 01:22:21 +01:00
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2014-03-27 15:05:34 +01:00
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local_bh_disable();
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2013-10-30 01:22:21 +01:00
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if (!flow->stats.is_percpu) {
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stats_reset(flow->stats.stat);
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} else {
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for_each_possible_cpu(cpu) {
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stats_reset(per_cpu_ptr(flow->stats.cpu_stats, cpu));
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}
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}
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2014-03-27 15:05:34 +01:00
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local_bh_enable();
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2013-08-08 05:01:00 +02:00
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}
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2011-10-26 04:26:31 +02:00
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static int check_header(struct sk_buff *skb, int len)
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{
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if (unlikely(skb->len < len))
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return -EINVAL;
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if (unlikely(!pskb_may_pull(skb, len)))
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return -ENOMEM;
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return 0;
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}
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static bool arphdr_ok(struct sk_buff *skb)
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{
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return pskb_may_pull(skb, skb_network_offset(skb) +
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sizeof(struct arp_eth_header));
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}
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static int check_iphdr(struct sk_buff *skb)
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{
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unsigned int nh_ofs = skb_network_offset(skb);
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unsigned int ip_len;
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int err;
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err = check_header(skb, nh_ofs + sizeof(struct iphdr));
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if (unlikely(err))
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return err;
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ip_len = ip_hdrlen(skb);
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if (unlikely(ip_len < sizeof(struct iphdr) ||
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skb->len < nh_ofs + ip_len))
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return -EINVAL;
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skb_set_transport_header(skb, nh_ofs + ip_len);
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return 0;
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}
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static bool tcphdr_ok(struct sk_buff *skb)
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{
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int th_ofs = skb_transport_offset(skb);
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int tcp_len;
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if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr))))
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return false;
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tcp_len = tcp_hdrlen(skb);
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if (unlikely(tcp_len < sizeof(struct tcphdr) ||
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skb->len < th_ofs + tcp_len))
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return false;
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return true;
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}
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static bool udphdr_ok(struct sk_buff *skb)
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{
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return pskb_may_pull(skb, skb_transport_offset(skb) +
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sizeof(struct udphdr));
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}
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2013-08-22 21:30:48 +02:00
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static bool sctphdr_ok(struct sk_buff *skb)
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{
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return pskb_may_pull(skb, skb_transport_offset(skb) +
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sizeof(struct sctphdr));
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}
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2011-10-26 04:26:31 +02:00
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static bool icmphdr_ok(struct sk_buff *skb)
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{
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return pskb_may_pull(skb, skb_transport_offset(skb) +
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sizeof(struct icmphdr));
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}
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2013-08-08 05:01:00 +02:00
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static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
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2011-10-26 04:26:31 +02:00
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{
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unsigned int nh_ofs = skb_network_offset(skb);
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unsigned int nh_len;
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int payload_ofs;
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struct ipv6hdr *nh;
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uint8_t nexthdr;
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__be16 frag_off;
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int err;
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err = check_header(skb, nh_ofs + sizeof(*nh));
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if (unlikely(err))
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return err;
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nh = ipv6_hdr(skb);
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nexthdr = nh->nexthdr;
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payload_ofs = (u8 *)(nh + 1) - skb->data;
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key->ip.proto = NEXTHDR_NONE;
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key->ip.tos = ipv6_get_dsfield(nh);
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key->ip.ttl = nh->hop_limit;
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key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
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key->ipv6.addr.src = nh->saddr;
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key->ipv6.addr.dst = nh->daddr;
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payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off);
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if (unlikely(payload_ofs < 0))
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return -EINVAL;
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if (frag_off) {
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if (frag_off & htons(~0x7))
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key->ip.frag = OVS_FRAG_TYPE_LATER;
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else
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key->ip.frag = OVS_FRAG_TYPE_FIRST;
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}
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nh_len = payload_ofs - nh_ofs;
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skb_set_transport_header(skb, nh_ofs + nh_len);
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key->ip.proto = nexthdr;
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return nh_len;
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}
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static bool icmp6hdr_ok(struct sk_buff *skb)
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{
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return pskb_may_pull(skb, skb_transport_offset(skb) +
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sizeof(struct icmp6hdr));
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}
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static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
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{
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struct qtag_prefix {
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__be16 eth_type; /* ETH_P_8021Q */
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__be16 tci;
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};
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struct qtag_prefix *qp;
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if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16)))
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return 0;
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if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) +
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sizeof(__be16))))
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return -ENOMEM;
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qp = (struct qtag_prefix *) skb->data;
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key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT);
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__skb_pull(skb, sizeof(struct qtag_prefix));
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return 0;
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}
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static __be16 parse_ethertype(struct sk_buff *skb)
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{
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struct llc_snap_hdr {
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u8 dsap; /* Always 0xAA */
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u8 ssap; /* Always 0xAA */
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u8 ctrl;
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u8 oui[3];
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__be16 ethertype;
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};
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struct llc_snap_hdr *llc;
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__be16 proto;
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proto = *(__be16 *) skb->data;
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__skb_pull(skb, sizeof(__be16));
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2013-03-28 05:38:25 +01:00
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if (ntohs(proto) >= ETH_P_802_3_MIN)
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2011-10-26 04:26:31 +02:00
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return proto;
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if (skb->len < sizeof(struct llc_snap_hdr))
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return htons(ETH_P_802_2);
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if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr))))
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return htons(0);
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llc = (struct llc_snap_hdr *) skb->data;
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if (llc->dsap != LLC_SAP_SNAP ||
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llc->ssap != LLC_SAP_SNAP ||
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(llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0)
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return htons(ETH_P_802_2);
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__skb_pull(skb, sizeof(struct llc_snap_hdr));
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2013-02-19 20:10:30 +01:00
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2013-03-28 05:38:25 +01:00
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if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN)
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2013-02-19 20:10:30 +01:00
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return llc->ethertype;
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return htons(ETH_P_802_2);
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2011-10-26 04:26:31 +02:00
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}
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static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
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2013-08-08 05:01:00 +02:00
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int nh_len)
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2011-10-26 04:26:31 +02:00
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{
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|
|
struct icmp6hdr *icmp = icmp6_hdr(skb);
|
|
|
|
|
|
|
|
/* The ICMPv6 type and code fields use the 16-bit transport port
|
|
|
|
* fields, so we need to store them in 16-bit network byte order.
|
|
|
|
*/
|
|
|
|
key->ipv6.tp.src = htons(icmp->icmp6_type);
|
|
|
|
key->ipv6.tp.dst = htons(icmp->icmp6_code);
|
|
|
|
|
|
|
|
if (icmp->icmp6_code == 0 &&
|
|
|
|
(icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION ||
|
|
|
|
icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) {
|
|
|
|
int icmp_len = skb->len - skb_transport_offset(skb);
|
|
|
|
struct nd_msg *nd;
|
|
|
|
int offset;
|
|
|
|
|
|
|
|
/* In order to process neighbor discovery options, we need the
|
|
|
|
* entire packet.
|
|
|
|
*/
|
|
|
|
if (unlikely(icmp_len < sizeof(*nd)))
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (unlikely(skb_linearize(skb)))
|
|
|
|
return -ENOMEM;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
nd = (struct nd_msg *)skb_transport_header(skb);
|
|
|
|
key->ipv6.nd.target = nd->target;
|
|
|
|
|
|
|
|
icmp_len -= sizeof(*nd);
|
|
|
|
offset = 0;
|
|
|
|
while (icmp_len >= 8) {
|
|
|
|
struct nd_opt_hdr *nd_opt =
|
|
|
|
(struct nd_opt_hdr *)(nd->opt + offset);
|
|
|
|
int opt_len = nd_opt->nd_opt_len * 8;
|
|
|
|
|
|
|
|
if (unlikely(!opt_len || opt_len > icmp_len))
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
/* Store the link layer address if the appropriate
|
|
|
|
* option is provided. It is considered an error if
|
|
|
|
* the same link layer option is specified twice.
|
|
|
|
*/
|
|
|
|
if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR
|
|
|
|
&& opt_len == 8) {
|
|
|
|
if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
|
|
|
|
goto invalid;
|
|
|
|
memcpy(key->ipv6.nd.sll,
|
|
|
|
&nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
|
|
|
|
} else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR
|
|
|
|
&& opt_len == 8) {
|
|
|
|
if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
|
|
|
|
goto invalid;
|
|
|
|
memcpy(key->ipv6.nd.tll,
|
|
|
|
&nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN);
|
|
|
|
}
|
|
|
|
|
|
|
|
icmp_len -= opt_len;
|
|
|
|
offset += opt_len;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
invalid:
|
|
|
|
memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
|
|
|
|
memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
|
|
|
|
memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
|
|
|
|
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ovs_flow_extract - extracts a flow key from an Ethernet frame.
|
|
|
|
* @skb: sk_buff that contains the frame, with skb->data pointing to the
|
|
|
|
* Ethernet header
|
|
|
|
* @in_port: port number on which @skb was received.
|
|
|
|
* @key: output flow key
|
|
|
|
*
|
|
|
|
* The caller must ensure that skb->len >= ETH_HLEN.
|
|
|
|
*
|
|
|
|
* Returns 0 if successful, otherwise a negative errno value.
|
|
|
|
*
|
|
|
|
* Initializes @skb header pointers as follows:
|
|
|
|
*
|
|
|
|
* - skb->mac_header: the Ethernet header.
|
|
|
|
*
|
|
|
|
* - skb->network_header: just past the Ethernet header, or just past the
|
|
|
|
* VLAN header, to the first byte of the Ethernet payload.
|
|
|
|
*
|
2013-06-03 19:01:14 +02:00
|
|
|
* - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
|
2011-10-26 04:26:31 +02:00
|
|
|
* on output, then just past the IP header, if one is present and
|
|
|
|
* of a correct length, otherwise the same as skb->network_header.
|
2013-06-03 19:01:14 +02:00
|
|
|
* For other key->eth.type values it is left untouched.
|
2011-10-26 04:26:31 +02:00
|
|
|
*/
|
2013-08-08 05:01:00 +02:00
|
|
|
int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key)
|
2011-10-26 04:26:31 +02:00
|
|
|
{
|
2013-08-08 05:01:00 +02:00
|
|
|
int error;
|
2011-10-26 04:26:31 +02:00
|
|
|
struct ethhdr *eth;
|
|
|
|
|
|
|
|
memset(key, 0, sizeof(*key));
|
|
|
|
|
|
|
|
key->phy.priority = skb->priority;
|
2013-06-18 02:50:18 +02:00
|
|
|
if (OVS_CB(skb)->tun_key)
|
|
|
|
memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key));
|
2011-10-26 04:26:31 +02:00
|
|
|
key->phy.in_port = in_port;
|
2012-11-26 20:24:11 +01:00
|
|
|
key->phy.skb_mark = skb->mark;
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
skb_reset_mac_header(skb);
|
|
|
|
|
|
|
|
/* Link layer. We are guaranteed to have at least the 14 byte Ethernet
|
|
|
|
* header in the linear data area.
|
|
|
|
*/
|
|
|
|
eth = eth_hdr(skb);
|
|
|
|
memcpy(key->eth.src, eth->h_source, ETH_ALEN);
|
|
|
|
memcpy(key->eth.dst, eth->h_dest, ETH_ALEN);
|
|
|
|
|
|
|
|
__skb_pull(skb, 2 * ETH_ALEN);
|
2013-06-13 20:11:44 +02:00
|
|
|
/* We are going to push all headers that we pull, so no need to
|
|
|
|
* update skb->csum here.
|
|
|
|
*/
|
2011-10-26 04:26:31 +02:00
|
|
|
|
|
|
|
if (vlan_tx_tag_present(skb))
|
|
|
|
key->eth.tci = htons(skb->vlan_tci);
|
|
|
|
else if (eth->h_proto == htons(ETH_P_8021Q))
|
|
|
|
if (unlikely(parse_vlan(skb, key)))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
key->eth.type = parse_ethertype(skb);
|
|
|
|
if (unlikely(key->eth.type == htons(0)))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
skb_reset_network_header(skb);
|
|
|
|
__skb_push(skb, skb->data - skb_mac_header(skb));
|
|
|
|
|
|
|
|
/* Network layer. */
|
|
|
|
if (key->eth.type == htons(ETH_P_IP)) {
|
|
|
|
struct iphdr *nh;
|
|
|
|
__be16 offset;
|
|
|
|
|
|
|
|
error = check_iphdr(skb);
|
|
|
|
if (unlikely(error)) {
|
|
|
|
if (error == -EINVAL) {
|
|
|
|
skb->transport_header = skb->network_header;
|
|
|
|
error = 0;
|
|
|
|
}
|
2013-08-08 05:01:00 +02:00
|
|
|
return error;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
nh = ip_hdr(skb);
|
|
|
|
key->ipv4.addr.src = nh->saddr;
|
|
|
|
key->ipv4.addr.dst = nh->daddr;
|
|
|
|
|
|
|
|
key->ip.proto = nh->protocol;
|
|
|
|
key->ip.tos = nh->tos;
|
|
|
|
key->ip.ttl = nh->ttl;
|
|
|
|
|
|
|
|
offset = nh->frag_off & htons(IP_OFFSET);
|
|
|
|
if (offset) {
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_LATER;
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
if (nh->frag_off & htons(IP_MF) ||
|
|
|
|
skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_FIRST;
|
|
|
|
|
|
|
|
/* Transport layer. */
|
|
|
|
if (key->ip.proto == IPPROTO_TCP) {
|
|
|
|
if (tcphdr_ok(skb)) {
|
|
|
|
struct tcphdr *tcp = tcp_hdr(skb);
|
|
|
|
key->ipv4.tp.src = tcp->source;
|
|
|
|
key->ipv4.tp.dst = tcp->dest;
|
2013-10-23 10:44:59 +02:00
|
|
|
key->ipv4.tp.flags = TCP_FLAGS_BE16(tcp);
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
} else if (key->ip.proto == IPPROTO_UDP) {
|
|
|
|
if (udphdr_ok(skb)) {
|
|
|
|
struct udphdr *udp = udp_hdr(skb);
|
|
|
|
key->ipv4.tp.src = udp->source;
|
|
|
|
key->ipv4.tp.dst = udp->dest;
|
|
|
|
}
|
2013-08-22 21:30:48 +02:00
|
|
|
} else if (key->ip.proto == IPPROTO_SCTP) {
|
|
|
|
if (sctphdr_ok(skb)) {
|
|
|
|
struct sctphdr *sctp = sctp_hdr(skb);
|
|
|
|
key->ipv4.tp.src = sctp->source;
|
|
|
|
key->ipv4.tp.dst = sctp->dest;
|
|
|
|
}
|
2011-10-26 04:26:31 +02:00
|
|
|
} else if (key->ip.proto == IPPROTO_ICMP) {
|
|
|
|
if (icmphdr_ok(skb)) {
|
|
|
|
struct icmphdr *icmp = icmp_hdr(skb);
|
|
|
|
/* The ICMP type and code fields use the 16-bit
|
|
|
|
* transport port fields, so we need to store
|
|
|
|
* them in 16-bit network byte order. */
|
|
|
|
key->ipv4.tp.src = htons(icmp->type);
|
|
|
|
key->ipv4.tp.dst = htons(icmp->code);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-11-02 22:14:31 +01:00
|
|
|
} else if ((key->eth.type == htons(ETH_P_ARP) ||
|
|
|
|
key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) {
|
2011-10-26 04:26:31 +02:00
|
|
|
struct arp_eth_header *arp;
|
|
|
|
|
|
|
|
arp = (struct arp_eth_header *)skb_network_header(skb);
|
|
|
|
|
|
|
|
if (arp->ar_hrd == htons(ARPHRD_ETHER)
|
|
|
|
&& arp->ar_pro == htons(ETH_P_IP)
|
|
|
|
&& arp->ar_hln == ETH_ALEN
|
|
|
|
&& arp->ar_pln == 4) {
|
|
|
|
|
|
|
|
/* We only match on the lower 8 bits of the opcode. */
|
|
|
|
if (ntohs(arp->ar_op) <= 0xff)
|
|
|
|
key->ip.proto = ntohs(arp->ar_op);
|
2012-10-30 23:50:28 +01:00
|
|
|
memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
|
|
|
|
memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
|
|
|
|
memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN);
|
|
|
|
memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN);
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
} else if (key->eth.type == htons(ETH_P_IPV6)) {
|
|
|
|
int nh_len; /* IPv6 Header + Extensions */
|
|
|
|
|
2013-08-08 05:01:00 +02:00
|
|
|
nh_len = parse_ipv6hdr(skb, key);
|
2011-10-26 04:26:31 +02:00
|
|
|
if (unlikely(nh_len < 0)) {
|
2013-08-08 05:01:00 +02:00
|
|
|
if (nh_len == -EINVAL) {
|
2011-10-26 04:26:31 +02:00
|
|
|
skb->transport_header = skb->network_header;
|
2013-08-08 05:01:00 +02:00
|
|
|
error = 0;
|
|
|
|
} else {
|
2011-10-26 04:26:31 +02:00
|
|
|
error = nh_len;
|
2013-08-08 05:01:00 +02:00
|
|
|
}
|
|
|
|
return error;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (key->ip.frag == OVS_FRAG_TYPE_LATER)
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)
|
|
|
|
key->ip.frag = OVS_FRAG_TYPE_FIRST;
|
|
|
|
|
|
|
|
/* Transport layer. */
|
|
|
|
if (key->ip.proto == NEXTHDR_TCP) {
|
|
|
|
if (tcphdr_ok(skb)) {
|
|
|
|
struct tcphdr *tcp = tcp_hdr(skb);
|
|
|
|
key->ipv6.tp.src = tcp->source;
|
|
|
|
key->ipv6.tp.dst = tcp->dest;
|
2013-10-23 10:44:59 +02:00
|
|
|
key->ipv6.tp.flags = TCP_FLAGS_BE16(tcp);
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
} else if (key->ip.proto == NEXTHDR_UDP) {
|
|
|
|
if (udphdr_ok(skb)) {
|
|
|
|
struct udphdr *udp = udp_hdr(skb);
|
|
|
|
key->ipv6.tp.src = udp->source;
|
|
|
|
key->ipv6.tp.dst = udp->dest;
|
|
|
|
}
|
2013-08-22 21:30:48 +02:00
|
|
|
} else if (key->ip.proto == NEXTHDR_SCTP) {
|
|
|
|
if (sctphdr_ok(skb)) {
|
|
|
|
struct sctphdr *sctp = sctp_hdr(skb);
|
|
|
|
key->ipv6.tp.src = sctp->source;
|
|
|
|
key->ipv6.tp.dst = sctp->dest;
|
|
|
|
}
|
2011-10-26 04:26:31 +02:00
|
|
|
} else if (key->ip.proto == NEXTHDR_ICMP) {
|
|
|
|
if (icmp6hdr_ok(skb)) {
|
2013-08-08 05:01:00 +02:00
|
|
|
error = parse_icmpv6(skb, key, nh_len);
|
|
|
|
if (error)
|
|
|
|
return error;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-08-08 05:01:00 +02:00
|
|
|
return 0;
|
2011-10-26 04:26:31 +02:00
|
|
|
}
|