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routesync.cpp
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routesync.cpp
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#include <netlink/route/link.h>
#include <netlink/route/route.h>
#include <netlink/route/nexthop.h>
#include "logger.h"
#include "select.h"
#include "netmsg.h"
#include "ipprefix.h"
#include "dbconnector.h"
#include "producerstatetable.h"
#include "fpmsyncd/fpmlink.h"
#include "fpmsyncd/routesync.h"
#include "macaddress.h"
#include "converter.h"
#include <string.h>
#include <arpa/inet.h>
using namespace std;
using namespace swss;
#define VXLAN_IF_NAME_PREFIX "Brvxlan"
#define VNET_PREFIX "Vnet"
#define VRF_PREFIX "Vrf"
#define MGMT_VRF_PREFIX "mgmt"
#define NHG_DELIMITER ','
#ifndef ETH_ALEN
#define ETH_ALEN 6
#endif
#ifndef NDA_RTA
#define NDA_RTA(r) \
((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
#endif
#define VXLAN_VNI 0
#define VXLAN_RMAC 1
#define NH_ENCAP_VXLAN 100
#define IPV4_MAX_BYTE 4
#define IPV6_MAX_BYTE 16
#define IPV4_MAX_BITLEN 32
#define IPV6_MAX_BITLEN 128
#define ETHER_ADDR_STRLEN (3*ETH_ALEN)
/* Returns name of the protocol passed number represents */
static string getProtocolString(int proto)
{
static constexpr size_t protocolNameBufferSize = 128;
char buffer[protocolNameBufferSize] = {};
if (!rtnl_route_proto2str(proto, buffer, sizeof(buffer)))
{
return std::to_string(proto);
}
return buffer;
}
/* Helper to create unique pointer with custom destructor */
template<typename T, typename F>
static decltype(auto) makeUniqueWithDestructor(T* ptr, F func)
{
return std::unique_ptr<T, F>(ptr, func);
}
template<typename T>
static decltype(auto) makeNlAddr(const T& ip)
{
nl_addr* addr;
nl_addr_parse(ip.to_string().c_str(), AF_UNSPEC, &addr);
return makeUniqueWithDestructor(addr, nl_addr_put);
}
RouteSync::RouteSync(RedisPipeline *pipeline) :
m_routeTable(pipeline, APP_ROUTE_TABLE_NAME, true),
m_label_routeTable(pipeline, APP_LABEL_ROUTE_TABLE_NAME, true),
m_vnet_routeTable(pipeline, APP_VNET_RT_TABLE_NAME, true),
m_vnet_tunnelTable(pipeline, APP_VNET_RT_TUNNEL_TABLE_NAME, true),
m_warmStartHelper(pipeline, &m_routeTable, APP_ROUTE_TABLE_NAME, "bgp", "bgp"),
m_nl_sock(NULL), m_link_cache(NULL)
{
m_nl_sock = nl_socket_alloc();
nl_connect(m_nl_sock, NETLINK_ROUTE);
rtnl_link_alloc_cache(m_nl_sock, AF_UNSPEC, &m_link_cache);
}
char *RouteSync::prefixMac2Str(char *mac, char *buf, int size)
{
char *ptr = buf;
if (!mac)
{
return NULL;
}
if (!buf)
{
return NULL;
}
snprintf(ptr, (ETHER_ADDR_STRLEN), "%02x:%02x:%02x:%02x:%02x:%02x",
(uint8_t)mac[0], (uint8_t)mac[1],
(uint8_t)mac[2], (uint8_t)mac[3],
(uint8_t)mac[4], (uint8_t)mac[5]);
return ptr;
}
/**
* parseRtAttrNested() - Parses a nested route attribute
* @tb: Pointer to array for storing rtattr in.
* @max: Max number to store.
* @rta: Pointer to rtattr to look for nested items in.
*/
void RouteSync::parseRtAttrNested(struct rtattr **tb, int max,
struct rtattr *rta)
{
netlink_parse_rtattr(tb, max, (struct rtattr *)RTA_DATA(rta), (int)RTA_PAYLOAD(rta));
}
/**
* @parseEncap() - Parses encapsulated attributes
* @tb: Pointer to rtattr to look for nested items in.
* @labels: Pointer to store vni in.
*
* Return: void.
*/
void RouteSync::parseEncap(struct rtattr *tb, uint32_t &encap_value, string &rmac)
{
struct rtattr *tb_encap[3] = {0};
char mac_buf[MAX_ADDR_SIZE+1];
char mac_val[MAX_ADDR_SIZE+1];
parseRtAttrNested(tb_encap, 3, tb);
encap_value = *(uint32_t *)RTA_DATA(tb_encap[VXLAN_VNI]);
memcpy(&mac_buf, RTA_DATA(tb_encap[VXLAN_RMAC]), MAX_ADDR_SIZE);
SWSS_LOG_INFO("Rx MAC %s VNI %d",
prefixMac2Str(mac_buf, mac_val, ETHER_ADDR_STRLEN), encap_value);
rmac = mac_val;
return;
}
void RouteSync::getEvpnNextHopSep(string& nexthops, string& vni_list,
string& mac_list, string& intf_list)
{
nexthops += NHG_DELIMITER;
vni_list += NHG_DELIMITER;
mac_list += NHG_DELIMITER;
intf_list += NHG_DELIMITER;
return;
}
void RouteSync::getEvpnNextHopGwIf(char *gwaddr, int vni_value,
string& nexthops, string& vni_list,
string& mac_list, string& intf_list,
string rmac, string vlan_id)
{
nexthops+= gwaddr;
vni_list+= to_string(vni_value);
mac_list+=rmac;
intf_list+=vlan_id;
}
bool RouteSync::getEvpnNextHop(struct nlmsghdr *h, int received_bytes,
struct rtattr *tb[], string& nexthops,
string& vni_list, string& mac_list,
string& intf_list)
{
void *gate = NULL;
char nexthopaddr[MAX_ADDR_SIZE] = {0};
char gateaddr[MAX_ADDR_SIZE] = {0};
uint32_t encap_value = 0;
uint32_t ecmp_count = 0;
uint16_t encap = 0;
int gw_af;
struct in6_addr ipv6_address;
string rmac;
string vlan;
int index;
char if_name[IFNAMSIZ] = "0";
char ifname_unknown[IFNAMSIZ] = "unknown";
if (tb[RTA_GATEWAY])
gate = RTA_DATA(tb[RTA_GATEWAY]);
if (h->nlmsg_type == RTM_NEWROUTE)
{
if (!tb[RTA_MULTIPATH])
{
gw_af = AF_INET; // default value
if (gate)
{
if (RTA_PAYLOAD(tb[RTA_GATEWAY]) <= IPV4_MAX_BYTE)
{
memcpy(gateaddr, gate, IPV4_MAX_BYTE);
gw_af = AF_INET;
}
else
{
memcpy(ipv6_address.s6_addr, gate, IPV6_MAX_BYTE);
gw_af = AF_INET6;
}
}
if(gw_af == AF_INET6)
{
if (IN6_IS_ADDR_V4MAPPED(&ipv6_address))
{
memcpy(gateaddr, (ipv6_address.s6_addr+12), IPV4_MAX_BYTE);
gw_af = AF_INET;
}
else
{
SWSS_LOG_NOTICE("IPv6 tunnel nexthop not supported Nexthop:%s encap:%d encap_value:%d",
inet_ntop(gw_af, ipv6_address.s6_addr, nexthopaddr, MAX_ADDR_SIZE), encap, encap_value);
return false;
}
}
inet_ntop(gw_af, gateaddr, nexthopaddr, MAX_ADDR_SIZE);
if (tb[RTA_OIF])
{
index = *(int *)RTA_DATA(tb[RTA_OIF]);
/* If we cannot get the interface name */
if (!getIfName(index, if_name, IFNAMSIZ))
{
strcpy(if_name, ifname_unknown);
}
vlan = if_name;
}
if (tb[RTA_ENCAP_TYPE])
{
encap = *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]);
}
if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE]
&& (*(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) == NH_ENCAP_VXLAN))
{
parseEncap(tb[RTA_ENCAP], encap_value, rmac);
}
SWSS_LOG_DEBUG("Rx MsgType:%d Nexthop:%s encap:%d encap_value:%d rmac:%s vlan:%s", h->nlmsg_type,
nexthopaddr, encap, encap_value, rmac.c_str(), vlan.c_str());
if (encap_value == 0 || !(vlan.compare(ifname_unknown)) || MacAddress(rmac) == MacAddress("00:00:00:00:00:00"))
{
return false;
}
getEvpnNextHopGwIf(nexthopaddr, encap_value, nexthops, vni_list, mac_list, intf_list, rmac, vlan);
}
else
{
/* This is a multipath route */
/* Need to add the code for multipath */
int len;
struct rtattr *subtb[RTA_MAX + 1];
struct rtnexthop *rtnh = (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]);
len = (int)RTA_PAYLOAD(tb[RTA_MULTIPATH]);
for (;;)
{
uint16_t encap = 0;
if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len)
{
break;
}
gate = 0;
if (rtnh->rtnh_len > sizeof(*rtnh))
{
memset(subtb, 0, sizeof(subtb));
netlink_parse_rtattr(subtb, RTA_MAX, RTNH_DATA(rtnh),
(int)(rtnh->rtnh_len - sizeof(*rtnh)));
if (subtb[RTA_GATEWAY])
{
gate = RTA_DATA(subtb[RTA_GATEWAY]);
}
if (gate)
{
if (RTA_PAYLOAD(subtb[RTA_GATEWAY]) <= IPV4_MAX_BYTE)
{
memcpy(gateaddr, gate, IPV4_MAX_BYTE);
gw_af = AF_INET;
}
else
{
memcpy(ipv6_address.s6_addr, gate, IPV6_MAX_BYTE);
gw_af = AF_INET6;
}
}
if(gw_af == AF_INET6)
{
if (IN6_IS_ADDR_V4MAPPED(&ipv6_address))
{
memcpy(gateaddr, (ipv6_address.s6_addr+12), IPV4_MAX_BYTE);
gw_af = AF_INET;
}
else
{
SWSS_LOG_NOTICE("IPv6 tunnel nexthop not supported Nexthop:%s encap:%d encap_value:%d",
inet_ntop(gw_af, ipv6_address.s6_addr, nexthopaddr, MAX_ADDR_SIZE), encap, encap_value);
return false;
}
}
inet_ntop(gw_af, gateaddr, nexthopaddr, MAX_ADDR_SIZE);
if (rtnh->rtnh_ifindex)
{
index = rtnh->rtnh_ifindex;
/* If we cannot get the interface name */
if (!getIfName(index, if_name, IFNAMSIZ))
{
strcpy(if_name, ifname_unknown);
}
vlan = if_name;
}
if (subtb[RTA_ENCAP_TYPE])
{
encap = *(uint16_t *)RTA_DATA(subtb[RTA_ENCAP_TYPE]);
}
if (subtb[RTA_ENCAP] && subtb[RTA_ENCAP_TYPE]
&& (*(uint16_t *)RTA_DATA(subtb[RTA_ENCAP_TYPE]) == NH_ENCAP_VXLAN))
{
parseEncap(subtb[RTA_ENCAP], encap_value, rmac);
}
SWSS_LOG_DEBUG("Multipath Nexthop:%s encap:%d encap_value:%d rmac:%s vlan:%s",
nexthopaddr, encap, encap_value, rmac.c_str(), vlan.c_str());
if (encap_value == 0 || !(vlan.compare(ifname_unknown)) || MacAddress(rmac) == MacAddress("00:00:00:00:00:00"))
{
return false;
}
if (gate)
{
if (ecmp_count)
{
getEvpnNextHopSep(nexthops, vni_list, mac_list, intf_list);
}
getEvpnNextHopGwIf(nexthopaddr, encap_value, nexthops, vni_list, mac_list, intf_list, rmac, vlan);
ecmp_count++;
}
}
if (rtnh->rtnh_len == 0)
{
break;
}
len -= NLMSG_ALIGN(rtnh->rtnh_len);
rtnh = RTNH_NEXT(rtnh);
}
}
}
return true;
}
void RouteSync::onEvpnRouteMsg(struct nlmsghdr *h, int len)
{
struct rtmsg *rtm;
struct rtattr *tb[RTA_MAX + 1] = {0};
void *dest = NULL;
char anyaddr[16] = {0};
char dstaddr[16] = {0};
int dst_len = 0;
char buf[MAX_ADDR_SIZE];
char destipprefix[IFNAMSIZ + MAX_ADDR_SIZE + 2] = {0};
int nlmsg_type = h->nlmsg_type;
unsigned int vrf_index;
rtm = (struct rtmsg *)NLMSG_DATA(h);
/* Parse attributes and extract fields of interest. */
netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len);
if (tb[RTA_DST])
{
dest = RTA_DATA(tb[RTA_DST]);
}
else
{
dest = anyaddr;
}
if (rtm->rtm_family == AF_INET)
{
if (rtm->rtm_dst_len > IPV4_MAX_BITLEN)
{
return;
}
memcpy(dstaddr, dest, IPV4_MAX_BYTE);
dst_len = rtm->rtm_dst_len;
}
else if (rtm->rtm_family == AF_INET6)
{
if (rtm->rtm_dst_len > IPV6_MAX_BITLEN)
{
return;
}
memcpy(dstaddr, dest, IPV6_MAX_BYTE);
dst_len = rtm->rtm_dst_len;
}
SWSS_LOG_DEBUG("Rx MsgType:%d Family:%d Prefix:%s/%d", h->nlmsg_type, rtm->rtm_family,
inet_ntop(rtm->rtm_family, dstaddr, buf, MAX_ADDR_SIZE), dst_len);
/* Table corresponding to route. */
if (tb[RTA_TABLE])
{
vrf_index = *(int *)RTA_DATA(tb[RTA_TABLE]);
}
else
{
vrf_index = rtm->rtm_table;
}
if (vrf_index)
{
if (!getIfName(vrf_index, destipprefix, IFNAMSIZ))
{
SWSS_LOG_ERROR("Fail to get the VRF name (ifindex %u)", vrf_index);
return;
}
/*
* Now vrf device name is required to start with VRF_PREFIX,
* it is difficult to split vrf_name:ipv6_addr.
*/
if (memcmp(destipprefix, VRF_PREFIX, strlen(VRF_PREFIX)))
{
SWSS_LOG_ERROR("Invalid VRF name %s (ifindex %u)", destipprefix, vrf_index);
return;
}
destipprefix[strlen(destipprefix)] = ':';
}
if((rtm->rtm_family == AF_INET && dst_len == IPV4_MAX_BITLEN)
|| (rtm->rtm_family == AF_INET6 && dst_len == IPV6_MAX_BITLEN))
{
snprintf(destipprefix + strlen(destipprefix), sizeof(destipprefix) - strlen(destipprefix), "%s",
inet_ntop(rtm->rtm_family, dstaddr, buf, MAX_ADDR_SIZE));
}
else
{
snprintf(destipprefix + strlen(destipprefix), sizeof(destipprefix) - strlen(destipprefix), "%s/%u",
inet_ntop(rtm->rtm_family, dstaddr, buf, MAX_ADDR_SIZE), dst_len);
}
auto proto_str = getProtocolString(rtm->rtm_protocol);
SWSS_LOG_INFO("Receive route message dest ip prefix: %s Op:%s",
destipprefix,
nlmsg_type == RTM_NEWROUTE ? "add":"del");
/*
* Upon arrival of a delete msg we could either push the change right away,
* or we could opt to defer it if we are going through a warm-reboot cycle.
*/
bool warmRestartInProgress = m_warmStartHelper.inProgress();
if (nlmsg_type == RTM_DELROUTE)
{
if (!warmRestartInProgress)
{
m_routeTable.del(destipprefix);
return;
}
else
{
SWSS_LOG_INFO("Warm-Restart mode: Receiving delete msg: %s",
destipprefix);
vector<FieldValueTuple> fvVector;
const KeyOpFieldsValuesTuple kfv = std::make_tuple(destipprefix,
DEL_COMMAND,
fvVector);
m_warmStartHelper.insertRefreshMap(kfv);
return;
}
}
else if (nlmsg_type != RTM_NEWROUTE)
{
return;
}
sendOffloadReply(h);
switch (rtm->rtm_type)
{
case RTN_BLACKHOLE:
case RTN_UNREACHABLE:
case RTN_PROHIBIT:
{
SWSS_LOG_ERROR("RTN_BLACKHOLE route not expected (%s)", destipprefix);
return;
}
case RTN_UNICAST:
break;
case RTN_MULTICAST:
case RTN_BROADCAST:
case RTN_LOCAL:
SWSS_LOG_NOTICE("BUM routes aren't supported yet (%s)", destipprefix);
return;
default:
return;
}
/* Get nexthop lists */
string nexthops;
string vni_list;
string mac_list;
string intf_list;
bool ret;
ret = getEvpnNextHop(h, len, tb, nexthops, vni_list, mac_list, intf_list);
if (ret == false)
{
SWSS_LOG_NOTICE("EVPN Route issue with RouteTable msg: %s vtep:%s vni:%s mac:%s intf:%s",
destipprefix, nexthops.c_str(), vni_list.c_str(), mac_list.c_str(), intf_list.c_str());
return;
}
if (nexthops.empty() || mac_list.empty())
{
SWSS_LOG_NOTICE("EVPN IP Prefix: %s nexthop or rmac is empty", destipprefix);
return;
}
vector<FieldValueTuple> fvVector;
FieldValueTuple nh("nexthop", nexthops);
FieldValueTuple intf("ifname", intf_list);
FieldValueTuple vni("vni_label", vni_list);
FieldValueTuple mac("router_mac", mac_list);
FieldValueTuple proto("protocol", proto_str);
fvVector.push_back(nh);
fvVector.push_back(intf);
fvVector.push_back(vni);
fvVector.push_back(mac);
fvVector.push_back(proto);
if (!warmRestartInProgress)
{
m_routeTable.set(destipprefix, fvVector);
SWSS_LOG_DEBUG("RouteTable set msg: %s vtep:%s vni:%s mac:%s intf:%s protocol:%s",
destipprefix, nexthops.c_str(), vni_list.c_str(), mac_list.c_str(), intf_list.c_str(),
proto_str.c_str());
}
/*
* During routing-stack restarting scenarios route-updates will be temporarily
* put on hold by warm-reboot logic.
*/
else
{
SWSS_LOG_INFO("Warm-Restart mode: RouteTable set msg: %s vtep:%s vni:%s mac:%s",
destipprefix, nexthops.c_str(), vni_list.c_str(), mac_list.c_str());
const KeyOpFieldsValuesTuple kfv = std::make_tuple(destipprefix,
SET_COMMAND,
fvVector);
m_warmStartHelper.insertRefreshMap(kfv);
}
return;
}
void RouteSync::onMsgRaw(struct nlmsghdr *h)
{
int len;
if ((h->nlmsg_type != RTM_NEWROUTE)
&& (h->nlmsg_type != RTM_DELROUTE))
return;
/* Length validity. */
len = (int)(h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)));
if (len < 0)
{
SWSS_LOG_ERROR("%s: Message received from netlink is of a broken size %d %zu",
__PRETTY_FUNCTION__, h->nlmsg_len,
(size_t)NLMSG_LENGTH(sizeof(struct ndmsg)));
return;
}
onEvpnRouteMsg(h, len);
return;
}
void RouteSync::onMsg(int nlmsg_type, struct nl_object *obj)
{
if (nlmsg_type == RTM_NEWLINK || nlmsg_type == RTM_DELLINK)
{
nl_cache_refill(m_nl_sock, m_link_cache);
return;
}
struct rtnl_route *route_obj = (struct rtnl_route *)obj;
/* Supports IPv4 or IPv6 address, otherwise return immediately */
auto family = rtnl_route_get_family(route_obj);
/* Check for Label route. */
if (family == AF_MPLS)
{
onLabelRouteMsg(nlmsg_type, obj);
return;
}
if (family != AF_INET && family != AF_INET6)
{
SWSS_LOG_INFO("Unknown route family support (object: %s)", nl_object_get_type(obj));
return;
}
/* Get the index of the master device */
unsigned int master_index = rtnl_route_get_table(route_obj);
char master_name[IFNAMSIZ] = {0};
/* if the table_id is not set in the route obj then route is for default vrf. */
if (master_index)
{
/* Get the name of the master device */
getIfName(master_index, master_name, IFNAMSIZ);
/* If the master device name starts with VNET_PREFIX, it is a VNET route.
The VNET name is exactly the name of the associated master device. */
if (string(master_name).find(VNET_PREFIX) == 0)
{
onVnetRouteMsg(nlmsg_type, obj, string(master_name));
}
/* Otherwise, it is a regular route (include VRF route). */
else
{
onRouteMsg(nlmsg_type, obj, master_name);
}
}
else
{
onRouteMsg(nlmsg_type, obj, NULL);
}
}
/*
* Handle regular route (include VRF route)
* @arg nlmsg_type Netlink message type
* @arg obj Netlink object
* @arg vrf Vrf name
*/
void RouteSync::onRouteMsg(int nlmsg_type, struct nl_object *obj, char *vrf)
{
struct rtnl_route *route_obj = (struct rtnl_route *)obj;
struct nl_addr *dip;
char destipprefix[IFNAMSIZ + MAX_ADDR_SIZE + 2] = {0};
if (vrf)
{
/*
* Now vrf device name is required to start with VRF_PREFIX,
* it is difficult to split vrf_name:ipv6_addr.
*/
if (memcmp(vrf, VRF_PREFIX, strlen(VRF_PREFIX)))
{
if(memcmp(vrf, MGMT_VRF_PREFIX, strlen(MGMT_VRF_PREFIX)))
{
SWSS_LOG_ERROR("Invalid VRF name %s (ifindex %u)", vrf, rtnl_route_get_table(route_obj));
}
else
{
dip = rtnl_route_get_dst(route_obj);
nl_addr2str(dip, destipprefix, MAX_ADDR_SIZE);
SWSS_LOG_INFO("Skip routes for Mgmt VRF name %s (ifindex %u) prefix: %s", vrf,
rtnl_route_get_table(route_obj), destipprefix);
}
return;
}
memcpy(destipprefix, vrf, strlen(vrf));
destipprefix[strlen(vrf)] = ':';
}
dip = rtnl_route_get_dst(route_obj);
nl_addr2str(dip, destipprefix + strlen(destipprefix), MAX_ADDR_SIZE);
/*
* Upon arrival of a delete msg we could either push the change right away,
* or we could opt to defer it if we are going through a warm-reboot cycle.
*/
bool warmRestartInProgress = m_warmStartHelper.inProgress();
if (nlmsg_type == RTM_DELROUTE)
{
if (!warmRestartInProgress)
{
m_routeTable.del(destipprefix);
return;
}
else
{
SWSS_LOG_INFO("Warm-Restart mode: Receiving delete msg: %s",
destipprefix);
vector<FieldValueTuple> fvVector;
const KeyOpFieldsValuesTuple kfv = std::make_tuple(destipprefix,
DEL_COMMAND,
fvVector);
m_warmStartHelper.insertRefreshMap(kfv);
return;
}
}
else if (nlmsg_type != RTM_NEWROUTE)
{
SWSS_LOG_INFO("Unknown message-type: %d for %s", nlmsg_type, destipprefix);
return;
}
if (!isSuppressionEnabled())
{
sendOffloadReply(route_obj);
}
switch (rtnl_route_get_type(route_obj))
{
case RTN_BLACKHOLE:
{
vector<FieldValueTuple> fvVector;
FieldValueTuple fv("blackhole", "true");
fvVector.push_back(fv);
m_routeTable.set(destipprefix, fvVector);
return;
}
case RTN_UNICAST:
break;
case RTN_MULTICAST:
case RTN_BROADCAST:
case RTN_LOCAL:
SWSS_LOG_INFO("BUM routes aren't supported yet (%s)", destipprefix);
return;
default:
return;
}
struct nl_list_head *nhs = rtnl_route_get_nexthops(route_obj);
if (!nhs)
{
SWSS_LOG_INFO("Nexthop list is empty for %s", destipprefix);
return;
}
/* Get nexthop lists */
string gw_list;
string intf_list;
string mpls_list;
getNextHopList(route_obj, gw_list, mpls_list, intf_list);
string weights = getNextHopWt(route_obj);
vector<string> alsv = tokenize(intf_list, NHG_DELIMITER);
for (auto alias : alsv)
{
/*
* An FRR behavior change from 7.2 to 7.5 makes FRR update default route to eth0 in interface
* up/down events. Skipping routes to eth0 or docker0 to avoid such behavior
*/
if (alias == "eth0" || alias == "docker0")
{
SWSS_LOG_DEBUG("Skip routes to eth0 or docker0: %s %s %s",
destipprefix, gw_list.c_str(), intf_list.c_str());
// If intf_list has only this interface, that means all of the next hops of this route
// have been removed and the next hop on the eth0/docker0 has become the only next hop.
// In this case since we do not want the route with next hop on eth0/docker0, we return.
// But still we need to clear the route from the APPL_DB. Otherwise the APPL_DB and data
// path will be left with stale route entry
if(alsv.size() == 1)
{
if (!warmRestartInProgress)
{
SWSS_LOG_NOTICE("RouteTable del msg for route with only one nh on eth0/docker0: %s %s %s %s",
destipprefix, gw_list.c_str(), intf_list.c_str(), mpls_list.c_str());
m_routeTable.del(destipprefix);
}
else
{
SWSS_LOG_NOTICE("Warm-Restart mode: Receiving delete msg for route with only nh on eth0/docker0: %s %s %s %s",
destipprefix, gw_list.c_str(), intf_list.c_str(), mpls_list.c_str());
vector<FieldValueTuple> fvVector;
const KeyOpFieldsValuesTuple kfv = std::make_tuple(destipprefix,
DEL_COMMAND,
fvVector);
m_warmStartHelper.insertRefreshMap(kfv);
}
}
return;
}
}
auto proto_num = rtnl_route_get_protocol(route_obj);
auto proto_str = getProtocolString(proto_num);
vector<FieldValueTuple> fvVector;
FieldValueTuple proto("protocol", proto_str);
FieldValueTuple gw("nexthop", gw_list);
FieldValueTuple intf("ifname", intf_list);
fvVector.push_back(proto);
fvVector.push_back(gw);
fvVector.push_back(intf);
if (!mpls_list.empty())
{
FieldValueTuple mpls_nh("mpls_nh", mpls_list);
fvVector.push_back(mpls_nh);
}
if (!weights.empty())
{
FieldValueTuple wt("weight", weights);
fvVector.push_back(wt);
}
if (!warmRestartInProgress)
{
m_routeTable.set(destipprefix, fvVector);
SWSS_LOG_DEBUG("RouteTable set msg: %s %s %s %s", destipprefix,
gw_list.c_str(), intf_list.c_str(), mpls_list.c_str());
}
/*
* During routing-stack restarting scenarios route-updates will be temporarily
* put on hold by warm-reboot logic.
*/
else
{
SWSS_LOG_INFO("Warm-Restart mode: RouteTable set msg: %s %s %s %s", destipprefix,
gw_list.c_str(), intf_list.c_str(), mpls_list.c_str());
const KeyOpFieldsValuesTuple kfv = std::make_tuple(destipprefix,
SET_COMMAND,
fvVector);
m_warmStartHelper.insertRefreshMap(kfv);
}
}
/*
* Handle label route
* @arg nlmsg_type Netlink message type
* @arg obj Netlink object
*/
void RouteSync::onLabelRouteMsg(int nlmsg_type, struct nl_object *obj)
{
struct rtnl_route *route_obj = (struct rtnl_route *)obj;
struct nl_addr *daddr;
char destaddr[MAX_ADDR_SIZE + 1] = {0};
daddr = rtnl_route_get_dst(route_obj);
nl_addr2str(daddr, destaddr, MAX_ADDR_SIZE);
SWSS_LOG_INFO("Receive new LabelRoute message dest addr: %s", destaddr);
if (nl_addr_iszero(daddr)) return;
if (nlmsg_type == RTM_DELROUTE)
{
m_label_routeTable.del(destaddr);
return;
}
else if (nlmsg_type != RTM_NEWROUTE)
{
SWSS_LOG_INFO("Unknown message-type: %d for LabelRoute %s", nlmsg_type, destaddr);
return;
}
sendOffloadReply(route_obj);
/* Get the index of the master device */
uint32_t master_index = rtnl_route_get_table(route_obj);
/* if the table_id is not set in the route obj then route is for default vrf. */
if (master_index)
{
SWSS_LOG_INFO("Unsupported Non-default VRF: %d for LabelRoute %s",
master_index, destaddr);
return;
}
switch (rtnl_route_get_type(route_obj))
{
case RTN_BLACKHOLE:
{
vector<FieldValueTuple> fvVector;
FieldValueTuple fv("blackhole", "true");
fvVector.push_back(fv);
m_label_routeTable.set(destaddr, fvVector);
return;
}
case RTN_UNICAST:
break;
case RTN_MULTICAST:
case RTN_BROADCAST:
case RTN_LOCAL:
SWSS_LOG_INFO("BUM routes aren't supported yet (%s)", destaddr);
return;
default:
return;
}
struct nl_list_head *nhs = rtnl_route_get_nexthops(route_obj);
if (!nhs)
{
SWSS_LOG_INFO("Nexthop list is empty for LabelRoute %s", destaddr);
return;
}
/* Get nexthop lists */
string gw_list;
string intf_list;
string mpls_list;
getNextHopList(route_obj, gw_list, mpls_list, intf_list);
vector<FieldValueTuple> fvVector;
FieldValueTuple gw("nexthop", gw_list);
FieldValueTuple intf("ifname", intf_list);
FieldValueTuple mpls_pop("mpls_pop", "1");
fvVector.push_back(gw);
fvVector.push_back(intf);
if (!mpls_list.empty())
{
FieldValueTuple mpls_nh("mpls_nh", mpls_list);
fvVector.push_back(mpls_nh);
}
fvVector.push_back(mpls_pop);
m_label_routeTable.set(destaddr, fvVector);
SWSS_LOG_INFO("LabelRouteTable set msg: %s %s %s %s", destaddr,
gw_list.c_str(), intf_list.c_str(), mpls_list.c_str());
}
/*
* Handle vnet route
* @arg nlmsg_type Netlink message type
* @arg obj Netlink object
* @arg vnet Vnet name
*/
void RouteSync::onVnetRouteMsg(int nlmsg_type, struct nl_object *obj, string vnet)
{
struct rtnl_route *route_obj = (struct rtnl_route *)obj;
/* Get the destination IP prefix */
struct nl_addr *dip = rtnl_route_get_dst(route_obj);
char destipprefix[MAX_ADDR_SIZE + 1] = {0};
nl_addr2str(dip, destipprefix, MAX_ADDR_SIZE);
string vnet_dip = vnet + string(":") + destipprefix;
SWSS_LOG_DEBUG("Receive new vnet route message %s", vnet_dip.c_str());
/* Ignore IPv6 link-local and mc addresses as Vnet routes */
auto family = rtnl_route_get_family(route_obj);
if (family == AF_INET6 &&
(IN6_IS_ADDR_LINKLOCAL(nl_addr_get_binary_addr(dip)) || IN6_IS_ADDR_MULTICAST(nl_addr_get_binary_addr(dip))))
{
SWSS_LOG_INFO("Ignore linklocal vnet routes %d for %s", nlmsg_type, vnet_dip.c_str());
return;
}
if (nlmsg_type == RTM_DELROUTE)
{
/* Duplicated delete as we do not know if it is a VXLAN tunnel route*/
m_vnet_routeTable.del(vnet_dip);
m_vnet_tunnelTable.del(vnet_dip);
return;
}
else if (nlmsg_type != RTM_NEWROUTE)
{
SWSS_LOG_INFO("Unknown message-type: %d for %s", nlmsg_type, vnet_dip.c_str());
return;
}
sendOffloadReply(route_obj);
switch (rtnl_route_get_type(route_obj))
{
case RTN_UNICAST:
break;
/* We may support blackhole in the future */