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/*
* Copyright 2016 Intel Corporation
*
* 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 "tap_inject.h"
#include <librtnl/netns.h>
#include <vlibmemory/api.h>
#include <vnet/ethernet/arp_packet.h>
static void
add_del_addr (ns_addr_t * a, int is_del)
{
vlib_main_t * vm = vlib_get_main ();
u32 sw_if_index;
sw_if_index = tap_inject_lookup_sw_if_index_from_tap_if_index (
a->ifaddr.ifa_index);
if (sw_if_index == ~0)
return;
if (a->ifaddr.ifa_family == AF_INET)
{
ip4_add_del_interface_address (vm, sw_if_index,
(ip4_address_t *) a->local, a->ifaddr.ifa_prefixlen, is_del);
}
else if (a->ifaddr.ifa_family == AF_INET6)
{
ip6_add_del_interface_address (vm, sw_if_index,
(ip6_address_t *) a->addr, a->ifaddr.ifa_prefixlen, is_del);
}
}
struct set_flags_args {
u32 index;
u8 flags;
};
static void
set_flags_cb (struct set_flags_args * a)
{
vnet_sw_interface_set_flags (vnet_get_main (), a->index, a->flags);
}
static void
add_del_link (ns_link_t * l, int is_del)
{
struct set_flags_args args = { ~0, 0 };
vnet_sw_interface_t * sw;
u8 flags = 0;
u32 sw_if_index;
sw_if_index = tap_inject_lookup_sw_if_index_from_tap_if_index (
l->ifi.ifi_index);
if (sw_if_index == ~0)
return;
sw = vnet_get_sw_interface (vnet_get_main (), sw_if_index);
flags = sw->flags;
if (l->ifi.ifi_flags & IFF_UP)
flags |= VNET_SW_INTERFACE_FLAG_ADMIN_UP;
else
flags &= ~VNET_SW_INTERFACE_FLAG_ADMIN_UP;
args.index = sw_if_index;
args.flags = flags;
vl_api_rpc_call_main_thread (set_flags_cb, (u8 *)&args, sizeof (args));
}
static void
add_del_neigh (ns_neigh_t * n, int is_del)
{
vnet_main_t * vnet_main = vnet_get_main ();
vlib_main_t * vm = vlib_get_main ();
u32 sw_if_index;
sw_if_index = tap_inject_lookup_sw_if_index_from_tap_if_index (
n->nd.ndm_ifindex);
if (sw_if_index == ~0)
return;
if (n->nd.ndm_family == AF_INET)
{
ethernet_arp_ip4_over_ethernet_address_t a;
memset (&a, 0, sizeof (a));
clib_memcpy (&a.ethernet, n->lladdr, ETHER_ADDR_LEN);
clib_memcpy (&a.ip4, n->dst, sizeof (a.ip4));
if (n->nd.ndm_state & NUD_REACHABLE)
vnet_arp_set_ip4_over_ethernet (vnet_main, sw_if_index, ~0, &a, 0);
else if (n->nd.ndm_state & NUD_FAILED)
vnet_arp_unset_ip4_over_ethernet (vnet_main, sw_if_index, ~0, &a);
}
else if (n->nd.ndm_family == AF_INET6)
{
if (n->nd.ndm_state & NUD_REACHABLE)
vnet_set_ip6_ethernet_neighbor (vm, sw_if_index,
(ip6_address_t *) n->dst, n->lladdr, ETHER_ADDR_LEN, 0);
else
vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index,
(ip6_address_t *) n->dst, n->lladdr, ETHER_ADDR_LEN);
}
}
#define TAP_INJECT_HOST_ROUTE_TABLE_MAIN 254
static void
add_del_route (ns_route_t * r, int is_del)
{
u32 sw_if_index;
sw_if_index = tap_inject_lookup_sw_if_index_from_tap_if_index (r->oif);
if (sw_if_index == ~0 || r->table != TAP_INJECT_HOST_ROUTE_TABLE_MAIN)
return;
if (r->rtm.rtm_family == AF_INET)
{
ip4_add_del_route_next_hop (&ip4_main,
is_del ? IP4_ROUTE_FLAG_DEL : IP4_ROUTE_FLAG_ADD,
(ip4_address_t *) r->dst, r->rtm.rtm_dst_len,
(ip4_address_t *) r->gateway, sw_if_index, 0, ~0, 0);
}
else if (r->rtm.rtm_family == AF_INET6)
{
ip6_add_del_route_next_hop (&ip6_main,
is_del ? IP6_ROUTE_FLAG_DEL : IP6_ROUTE_FLAG_ADD,
(ip6_address_t *) r->dst, r->rtm.rtm_dst_len,
(ip6_address_t *) r->gateway, sw_if_index, 0, ~0, 0);
}
}
static void
netns_notify_cb (void * obj, netns_type_t type, u32 flags, uword opaque)
{
if (type == NETNS_TYPE_ADDR)
add_del_addr ((ns_addr_t *)obj, flags & NETNS_F_DEL);
else if (type == NETNS_TYPE_LINK)
add_del_link ((ns_link_t *)obj, flags & NETNS_F_DEL);
else if (type == NETNS_TYPE_NEIGH)
add_del_neigh ((ns_neigh_t *)obj, flags & NETNS_F_DEL);
else if (type == NETNS_TYPE_ROUTE)
add_del_route ((ns_route_t *)obj, flags & NETNS_F_DEL);
}
void
tap_inject_enable_netlink (void)
{
char nsname = 0;
netns_sub_t sub = {
.notify = netns_notify_cb,
.opaque = 0,
};
netns_open (&nsname, &sub);
}
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