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/*
* Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
* Copyright (c) 2013 Simon Horman
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "odp-execute.h"
#include <linux/openvswitch.h>
#include <stdlib.h>
#include <string.h>
#include "netlink.h"
#include "ofpbuf.h"
#include "odp-util.h"
#include "packets.h"
#include "unaligned.h"
#include "util.h"
static void
odp_eth_set_addrs(struct ofpbuf *packet, const struct ovs_key_ethernet *eth_key)
{
struct eth_header *eh = packet->l2;
memcpy(eh->eth_src, eth_key->eth_src, sizeof eh->eth_src);
memcpy(eh->eth_dst, eth_key->eth_dst, sizeof eh->eth_dst);
}
static void
odp_set_tunnel_action(const struct nlattr *a, struct flow_tnl *tun_key)
{
enum odp_key_fitness fitness;
fitness = odp_tun_key_from_attr(a, tun_key);
ovs_assert(fitness != ODP_FIT_ERROR);
}
static void
set_arp(struct ofpbuf *packet, const struct ovs_key_arp *arp_key)
{
struct arp_eth_header *arp = packet->l3;
arp->ar_op = arp_key->arp_op;
memcpy(arp->ar_sha, arp_key->arp_sha, ETH_ADDR_LEN);
put_16aligned_be32(&arp->ar_spa, arp_key->arp_sip);
memcpy(arp->ar_tha, arp_key->arp_tha, ETH_ADDR_LEN);
put_16aligned_be32(&arp->ar_tpa, arp_key->arp_tip);
}
static void
odp_execute_set_action(struct ofpbuf *packet, const struct nlattr *a,
struct flow *flow)
{
enum ovs_key_attr type = nl_attr_type(a);
const struct ovs_key_ipv4 *ipv4_key;
const struct ovs_key_ipv6 *ipv6_key;
const struct ovs_key_tcp *tcp_key;
const struct ovs_key_udp *udp_key;
const struct ovs_key_sctp *sctp_key;
switch (type) {
case OVS_KEY_ATTR_PRIORITY:
flow->skb_priority = nl_attr_get_u32(a);
break;
case OVS_KEY_ATTR_TUNNEL:
odp_set_tunnel_action(a, &flow->tunnel);
break;
case OVS_KEY_ATTR_SKB_MARK:
flow->pkt_mark = nl_attr_get_u32(a);
break;
case OVS_KEY_ATTR_ETHERNET:
odp_eth_set_addrs(packet,
nl_attr_get_unspec(a, sizeof(struct ovs_key_ethernet)));
break;
case OVS_KEY_ATTR_IPV4:
ipv4_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv4));
packet_set_ipv4(packet, ipv4_key->ipv4_src, ipv4_key->ipv4_dst,
ipv4_key->ipv4_tos, ipv4_key->ipv4_ttl);
break;
case OVS_KEY_ATTR_IPV6:
ipv6_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_ipv6));
packet_set_ipv6(packet, ipv6_key->ipv6_proto, ipv6_key->ipv6_src,
ipv6_key->ipv6_dst, ipv6_key->ipv6_tclass,
ipv6_key->ipv6_label, ipv6_key->ipv6_hlimit);
break;
case OVS_KEY_ATTR_TCP:
tcp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_tcp));
packet_set_tcp_port(packet, tcp_key->tcp_src, tcp_key->tcp_dst);
break;
case OVS_KEY_ATTR_UDP:
udp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_udp));
packet_set_udp_port(packet, udp_key->udp_src, udp_key->udp_dst);
break;
case OVS_KEY_ATTR_SCTP:
sctp_key = nl_attr_get_unspec(a, sizeof(struct ovs_key_sctp));
packet_set_sctp_port(packet, sctp_key->sctp_src, sctp_key->sctp_dst);
break;
case OVS_KEY_ATTR_MPLS:
set_mpls_lse(packet, nl_attr_get_be32(a));
break;
case OVS_KEY_ATTR_ARP:
set_arp(packet, nl_attr_get_unspec(a, sizeof(struct ovs_key_arp)));
break;
case OVS_KEY_ATTR_UNSPEC:
case OVS_KEY_ATTR_ENCAP:
case OVS_KEY_ATTR_ETHERTYPE:
case OVS_KEY_ATTR_IN_PORT:
case OVS_KEY_ATTR_VLAN:
case OVS_KEY_ATTR_ICMP:
case OVS_KEY_ATTR_ICMPV6:
case OVS_KEY_ATTR_ND:
case __OVS_KEY_ATTR_MAX:
default:
NOT_REACHED();
}
}
static void
odp_execute_sample(void *dp, struct ofpbuf *packet, struct flow *key,
const struct nlattr *action,
void (*output)(void *dp, struct ofpbuf *packet,
const struct flow *key,
odp_port_t out_port),
void (*userspace)(void *dp, struct ofpbuf *packet,
const struct flow *key,
const struct nlattr *action))
{
const struct nlattr *subactions = NULL;
const struct nlattr *a;
size_t left;
NL_NESTED_FOR_EACH_UNSAFE (a, left, action) {
int type = nl_attr_type(a);
switch ((enum ovs_sample_attr) type) {
case OVS_SAMPLE_ATTR_PROBABILITY:
if (random_uint32() >= nl_attr_get_u32(a)) {
return;
}
break;
case OVS_SAMPLE_ATTR_ACTIONS:
subactions = a;
break;
case OVS_SAMPLE_ATTR_UNSPEC:
case __OVS_SAMPLE_ATTR_MAX:
default:
NOT_REACHED();
}
}
odp_execute_actions(dp, packet, key, nl_attr_get(subactions),
nl_attr_get_size(subactions), output, userspace);
}
void
odp_execute_actions(void *dp, struct ofpbuf *packet, struct flow *key,
const struct nlattr *actions, size_t actions_len,
void (*output)(void *dp, struct ofpbuf *packet,
const struct flow *key,
odp_port_t out_port),
void (*userspace)(void *dp, struct ofpbuf *packet,
const struct flow *key,
const struct nlattr *action))
{
const struct nlattr *a;
unsigned int left;
NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) {
int type = nl_attr_type(a);
switch ((enum ovs_action_attr) type) {
case OVS_ACTION_ATTR_OUTPUT:
if (output) {
output(dp, packet, key, u32_to_odp(nl_attr_get_u32(a)));
}
break;
case OVS_ACTION_ATTR_USERSPACE: {
if (userspace) {
userspace(dp, packet, key, a);
}
break;
}
case OVS_ACTION_ATTR_PUSH_VLAN: {
const struct ovs_action_push_vlan *vlan = nl_attr_get(a);
eth_push_vlan(packet, vlan->vlan_tci);
break;
}
case OVS_ACTION_ATTR_POP_VLAN:
eth_pop_vlan(packet);
break;
case OVS_ACTION_ATTR_PUSH_MPLS: {
const struct ovs_action_push_mpls *mpls = nl_attr_get(a);
push_mpls(packet, mpls->mpls_ethertype, mpls->mpls_lse);
break;
}
case OVS_ACTION_ATTR_POP_MPLS:
pop_mpls(packet, nl_attr_get_be16(a));
break;
case OVS_ACTION_ATTR_SET:
odp_execute_set_action(packet, nl_attr_get(a), key);
break;
case OVS_ACTION_ATTR_SAMPLE:
odp_execute_sample(dp, packet, key, a, output, userspace);
break;
case OVS_ACTION_ATTR_UNSPEC:
case __OVS_ACTION_ATTR_MAX:
NOT_REACHED();
}
}
}
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