30bab1d3f9
Add lcpng_nl_sync.c that will house these functions. Their purpose is to take state learned from netlink messages, and apply that state to VPP. Some rearranging/plumbing was necessary to get logging to be visible in this new source file. Then, we add lcp_nl_neigh_add() and _del() which look up the LIP, convert the lladdr and ip address from Netlink into VPP variants, and then add or remove the ip4/ip6 neighbor adjacency.
139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
/* Hey Emacs use -*- mode: C -*- */
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/*
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* Copyright 2021 Cisco and/or its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sys/socket.h>
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#include <linux/if.h>
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#include <vnet/vnet.h>
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#include <vnet/plugin/plugin.h>
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#include <vppinfra/linux/netns.h>
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#include <plugins/lcpng/lcpng_interface.h>
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#include <plugins/lcpng/lcpng_netlink.h>
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#include <vnet/fib/fib_table.h>
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#include <vnet/mfib/mfib_table.h>
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#include <vnet/ip/ip6_ll_table.h>
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#include <vnet/ip-neighbor/ip_neighbor.h>
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#include <vnet/ip/ip6_link.h>
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#ifndef NUD_VALID
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#define NUD_VALID \
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(NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE | \
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NUD_DELAY)
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#endif
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static void
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lcp_nl_mk_ip_addr (const struct nl_addr *rna, ip_address_t *ia)
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{
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ip_address_reset (ia);
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ip_address_set (ia, nl_addr_get_binary_addr (rna),
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nl_addr_get_family (rna) == AF_INET6 ? AF_IP6 : AF_IP4);
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}
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static void
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lcp_nl_mk_mac_addr (const struct nl_addr *rna, mac_address_t *mac)
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{
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mac_address_from_bytes (mac, nl_addr_get_binary_addr (rna));
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}
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void
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lcp_nl_neigh_add (struct rtnl_neigh *rn)
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{
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lcp_itf_pair_t *lip;
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struct nl_addr *ll;
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ip_address_t nh;
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int state;
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NL_DBG ("neigh_add: netlink %U", format_nl_object, rn);
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if (!(lip = lcp_itf_pair_get (
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lcp_itf_pair_find_by_vif (rtnl_neigh_get_ifindex (rn)))))
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{
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NL_WARN ("neigh_add: no LCP for %U ", format_nl_object, rn);
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return;
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}
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lcp_nl_mk_ip_addr (rtnl_neigh_get_dst (rn), &nh);
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ll = rtnl_neigh_get_lladdr (rn);
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state = rtnl_neigh_get_state (rn);
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if (ll && (state & NUD_VALID))
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{
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mac_address_t mac;
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ip_neighbor_flags_t flags;
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int rv;
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lcp_nl_mk_mac_addr (ll, &mac);
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if (state & (NUD_NOARP | NUD_PERMANENT))
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flags = IP_NEIGHBOR_FLAG_STATIC;
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else
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flags = IP_NEIGHBOR_FLAG_DYNAMIC;
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rv = ip_neighbor_add (&nh, &mac, lip->lip_phy_sw_if_index, flags, NULL);
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if (rv)
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{
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NL_ERROR ("neigh_add: Failed %U lladdr %U iface %U",
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format_ip_address, &nh, format_mac_address, &mac,
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format_vnet_sw_if_index_name, vnet_get_main (),
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lip->lip_phy_sw_if_index);
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}
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else
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{
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NL_NOTICE ("neigh_add: Added %U lladdr %U iface %U",
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format_ip_address, &nh, format_mac_address, &mac,
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format_vnet_sw_if_index_name, vnet_get_main (),
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lip->lip_phy_sw_if_index);
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}
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}
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}
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void
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lcp_nl_neigh_del (struct rtnl_neigh *rn)
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{
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ip_address_t nh;
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int rv;
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NL_DBG ("neigh_del: netlink %U", format_nl_object, rn);
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lcp_itf_pair_t *lip;
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if (!(lip = lcp_itf_pair_get (
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lcp_itf_pair_find_by_vif (rtnl_neigh_get_ifindex (rn)))))
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{
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NL_WARN ("neigh_del: no LCP for %U ", format_nl_object, rn);
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return;
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}
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lcp_nl_mk_ip_addr (rtnl_neigh_get_dst (rn), &nh);
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rv = ip_neighbor_del (&nh, lip->lip_phy_sw_if_index);
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if (rv)
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{
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NL_ERROR ("neigh_del: Failed %U iface %U", format_ip_address, &nh,
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format_vnet_sw_if_index_name, vnet_get_main (),
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lip->lip_phy_sw_if_index);
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}
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else
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{
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NL_NOTICE ("neigh_del: Deleted %U iface %U", format_ip_address, &nh,
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format_vnet_sw_if_index_name, vnet_get_main (),
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lip->lip_phy_sw_if_index);
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}
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}
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