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/*
* Copyright (c) 2010 Nicira Networks.
*
* 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 <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include "netdev-provider.h"
#include "netdev-vport.h"
#include "openflow/openflow.h"
#include "openvswitch/tunnel.h"
#include "openvswitch/xflow.h"
#include "packets.h"
#include "socket-util.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(netdev_tunnel)
struct netdev_dev_tunnel {
struct netdev_dev netdev_dev;
};
struct netdev_tunnel {
struct netdev netdev;
};
static int netdev_tunnel_create(const char *name, const char *type,
const struct shash *args, struct netdev_dev **);
static struct netdev_dev_tunnel *
netdev_dev_tunnel_cast(const struct netdev_dev *netdev_dev)
{
assert(netdev_dev_get_class(netdev_dev)->create == netdev_tunnel_create);
return CONTAINER_OF(netdev_dev, struct netdev_dev_tunnel, netdev_dev);
}
static struct netdev_tunnel *
netdev_tunnel_cast(const struct netdev *netdev)
{
struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
assert(netdev_dev_get_class(netdev_dev)->create == netdev_tunnel_create);
return CONTAINER_OF(netdev, struct netdev_tunnel, netdev);
}
static int
parse_config(const char *name, const char *type, const struct shash *args,
struct tnl_port_config *config)
{
struct shash_node *node;
bool ipsec_ip_set = false;
bool ipsec_mech_set = false;
memset(config, 0, sizeof *config);
config->flags |= TNL_F_PMTUD;
config->flags |= TNL_F_HDR_CACHE;
SHASH_FOR_EACH (node, args) {
if (!strcmp(node->name, "remote_ip")) {
struct in_addr in_addr;
if (lookup_ip(node->data, &in_addr)) {
VLOG_WARN("%s: bad %s 'remote_ip'", name, type);
} else {
config->daddr = in_addr.s_addr;
}
} else if (!strcmp(node->name, "local_ip")) {
struct in_addr in_addr;
if (lookup_ip(node->data, &in_addr)) {
VLOG_WARN("%s: bad %s 'local_ip'", name, type);
} else {
config->saddr = in_addr.s_addr;
}
} else if (!strcmp(node->name, "key") && !strcmp(type, "gre")) {
if (!strcmp(node->data, "flow")) {
config->flags |= TNL_F_IN_KEY_MATCH;
config->flags |= TNL_F_OUT_KEY_ACTION;
} else {
config->out_key = config->in_key = htonl(atoi(node->data));
}
} else if (!strcmp(node->name, "in_key") && !strcmp(type, "gre")) {
if (!strcmp(node->data, "flow")) {
config->flags |= TNL_F_IN_KEY_MATCH;
} else {
config->in_key = htonl(atoi(node->data));
}
} else if (!strcmp(node->name, "out_key") && !strcmp(type, "gre")) {
if (!strcmp(node->data, "flow")) {
config->flags |= TNL_F_OUT_KEY_ACTION;
} else {
config->out_key = htonl(atoi(node->data));
}
} else if (!strcmp(node->name, "tos")) {
if (!strcmp(node->data, "inherit")) {
config->flags |= TNL_F_TOS_INHERIT;
} else {
config->tos = atoi(node->data);
}
} else if (!strcmp(node->name, "ttl")) {
if (!strcmp(node->data, "inherit")) {
config->flags |= TNL_F_TTL_INHERIT;
} else {
config->ttl = atoi(node->data);
}
} else if (!strcmp(node->name, "csum") && !strcmp(type, "gre")) {
if (!strcmp(node->data, "true")) {
config->flags |= TNL_F_CSUM;
}
} else if (!strcmp(node->name, "pmtud")) {
if (!strcmp(node->data, "false")) {
config->flags &= ~TNL_F_PMTUD;
}
} else if (!strcmp(node->name, "header_cache")) {
if (!strcmp(node->data, "false")) {
config->flags &= ~TNL_F_HDR_CACHE;
}
} else if (!strcmp(node->name, "ipsec_local_ip")) {
ipsec_ip_set = true;
} else if (!strcmp(node->name, "ipsec_cert")
|| !strcmp(node->name, "ipsec_psk")) {
ipsec_mech_set = true;
} else {
VLOG_WARN("%s: unknown %s argument '%s'", name, type, node->name);
}
}
/* IPsec doesn't work when header caching is enabled. Disable it if
* the IPsec local IP address and authentication mechanism have been
* defined. */
if (ipsec_ip_set && ipsec_mech_set) {
VLOG_INFO("%s: header caching disabled due to use of IPsec", name);
config->flags &= ~TNL_F_HDR_CACHE;
}
if (!config->daddr) {
VLOG_WARN("%s: %s type requires valid 'remote_ip' argument", name, type);
return EINVAL;
}
return 0;
}
static int
netdev_tunnel_create(const char *name, const char *type,
const struct shash *args, struct netdev_dev **netdev_devp)
{
int err;
struct xflow_vport_add ova;
struct tnl_port_config port_config;
struct netdev_dev_tunnel *netdev_dev;
ovs_strlcpy(ova.port_type, type, sizeof ova.port_type);
ovs_strlcpy(ova.devname, name, sizeof ova.devname);
ova.config = &port_config;
err = parse_config(name, type, args, &port_config);
if (err) {
return err;
}
err = netdev_vport_do_ioctl(XFLOW_VPORT_ADD, &ova);
if (err == EBUSY) {
VLOG_WARN("%s: destroying existing device", name);
err = netdev_vport_do_ioctl(XFLOW_VPORT_DEL, ova.devname);
if (err) {
return err;
}
err = netdev_vport_do_ioctl(XFLOW_VPORT_ADD, &ova);
}
if (err) {
return err;
}
netdev_dev = xmalloc(sizeof *netdev_dev);
if (!strcmp(type, "gre")) {
netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_gre_class);
} else {
netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_capwap_class);
}
*netdev_devp = &netdev_dev->netdev_dev;
return 0;
}
static int
netdev_tunnel_reconfigure(struct netdev_dev *netdev_dev_, const struct shash *args)
{
const char *name = netdev_dev_get_name(netdev_dev_);
struct xflow_vport_mod ovm;
struct tnl_port_config port_config;
int err;
ovs_strlcpy(ovm.devname, name, sizeof ovm.devname);
ovm.config = &port_config;
err = parse_config(name, netdev_dev_get_class(netdev_dev_)->type, args,
&port_config);
if (err) {
return err;
}
return netdev_vport_do_ioctl(XFLOW_VPORT_MOD, &ovm);
}
static void
netdev_tunnel_destroy(struct netdev_dev *netdev_dev_)
{
struct netdev_dev_tunnel *netdev_dev = netdev_dev_tunnel_cast(netdev_dev_);
netdev_vport_do_ioctl(XFLOW_VPORT_DEL, (char *)netdev_dev_get_name(netdev_dev_));
free(netdev_dev);
}
static int
netdev_tunnel_open(struct netdev_dev *netdev_dev_, int ethertype OVS_UNUSED,
struct netdev **netdevp)
{
struct netdev_tunnel *netdev;
netdev = xmalloc(sizeof *netdev);
netdev_init(&netdev->netdev, netdev_dev_);
*netdevp = &netdev->netdev;
return 0;
}
static void
netdev_tunnel_close(struct netdev *netdev_)
{
struct netdev_tunnel *netdev = netdev_tunnel_cast(netdev_);
free(netdev);
}
const struct netdev_class netdev_gre_class = {
"gre",
NULL, /* init */
NULL, /* run */
NULL, /* wait */
netdev_tunnel_create,
netdev_tunnel_destroy,
netdev_tunnel_reconfigure,
netdev_tunnel_open,
netdev_tunnel_close,
NULL, /* enumerate */
NULL, /* recv */
NULL, /* recv_wait */
NULL, /* drain */
NULL, /* send */
NULL, /* send_wait */
netdev_vport_set_etheraddr,
netdev_vport_get_etheraddr,
netdev_vport_get_mtu,
NULL, /* get_ifindex */
netdev_vport_get_carrier,
netdev_vport_get_stats,
netdev_vport_set_stats,
NULL, /* get_features */
NULL, /* set_advertisements */
NULL, /* get_vlan_vid */
NULL, /* set_policing */
NULL, /* get_qos_types */
NULL, /* get_qos_capabilities */
NULL, /* get_qos */
NULL, /* set_qos */
NULL, /* get_queue */
NULL, /* set_queue */
NULL, /* delete_queue */
NULL, /* get_queue_stats */
NULL, /* dump_queues */
NULL, /* dump_queue_stats */
NULL, /* get_in4 */
NULL, /* set_in4 */
NULL, /* get_in6 */
NULL, /* add_router */
NULL, /* get_next_hop */
NULL, /* arp_lookup */
netdev_vport_update_flags,
netdev_vport_poll_add,
netdev_vport_poll_remove,
};
const struct netdev_class netdev_capwap_class = {
"capwap",
NULL, /* init */
NULL, /* run */
NULL, /* wait */
netdev_tunnel_create,
netdev_tunnel_destroy,
netdev_tunnel_reconfigure,
netdev_tunnel_open,
netdev_tunnel_close,
NULL, /* enumerate */
NULL, /* recv */
NULL, /* recv_wait */
NULL, /* drain */
NULL, /* send */
NULL, /* send_wait */
netdev_vport_set_etheraddr,
netdev_vport_get_etheraddr,
netdev_vport_get_mtu,
NULL, /* get_ifindex */
netdev_vport_get_carrier,
netdev_vport_get_stats,
netdev_vport_set_stats,
NULL, /* get_features */
NULL, /* set_advertisements */
NULL, /* get_vlan_vid */
NULL, /* set_policing */
NULL, /* get_qos_types */
NULL, /* get_qos_capabilities */
NULL, /* get_qos */
NULL, /* set_qos */
NULL, /* get_queue */
NULL, /* set_queue */
NULL, /* delete_queue */
NULL, /* get_queue_stats */
NULL, /* dump_queues */
NULL, /* dump_queue_stats */
NULL, /* get_in4 */
NULL, /* set_in4 */
NULL, /* get_in6 */
NULL, /* add_router */
NULL, /* get_next_hop */
NULL, /* arp_lookup */
netdev_vport_update_flags,
netdev_vport_poll_add,
netdev_vport_poll_remove,
};
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