/
peers.go
498 lines (468 loc) · 16.6 KB
/
peers.go
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package logic
import (
"errors"
"fmt"
"net"
"net/netip"
"github.com/gravitl/netmaker/database"
"github.com/gravitl/netmaker/logger"
"github.com/gravitl/netmaker/logic/acls/nodeacls"
"github.com/gravitl/netmaker/models"
"github.com/gravitl/netmaker/servercfg"
"golang.org/x/exp/slices"
"golang.org/x/exp/slog"
"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
)
var (
// ResetFailOver - function to reset failOvered peers on this node
ResetFailOver = func(failOverNode *models.Node) error {
return nil
}
// ResetFailedOverPeer - removes failed over node from network peers
ResetFailedOverPeer = func(failedOverNode *models.Node) error {
return nil
}
// FailOverExists - check if failover node existed or not
FailOverExists = func(network string) (failOverNode models.Node, exists bool) {
return failOverNode, exists
}
// GetFailOverPeerIps - gets failover peerips
GetFailOverPeerIps = func(peer, node *models.Node) []net.IPNet {
return []net.IPNet{}
}
// CreateFailOver - creates failover in a network
CreateFailOver = func(node models.Node) error {
return nil
}
// SetDefaulGw
SetDefaultGw = func(node models.Node, peerUpdate models.HostPeerUpdate) models.HostPeerUpdate {
return peerUpdate
}
SetDefaultGwForRelayedUpdate = func(relayed, relay models.Node, peerUpdate models.HostPeerUpdate) models.HostPeerUpdate {
return peerUpdate
}
// UnsetInternetGw
UnsetInternetGw = func(node *models.Node) {
node.IsInternetGateway = false
}
// SetInternetGw
SetInternetGw = func(node *models.Node, req models.InetNodeReq) {
node.IsInternetGateway = true
}
// GetAllowedIpForInetNodeClient
GetAllowedIpForInetNodeClient = func(node, peer *models.Node) []net.IPNet {
return []net.IPNet{}
}
)
// GetPeerUpdateForHost - gets the consolidated peer update for the host from all networks
func GetPeerUpdateForHost(network string, host *models.Host, allNodes []models.Node,
deletedNode *models.Node, deletedClients []models.ExtClient) (models.HostPeerUpdate, error) {
if host == nil {
return models.HostPeerUpdate{}, errors.New("host is nil")
}
// track which nodes are deleted
// after peer calculation, if peer not in list, add delete config of peer
hostPeerUpdate := models.HostPeerUpdate{
Host: *host,
Server: servercfg.GetServer(),
ServerVersion: servercfg.GetVersion(),
ServerAddrs: []models.ServerAddr{},
FwUpdate: models.FwUpdate{
EgressInfo: make(map[string]models.EgressInfo),
},
PeerIDs: make(models.PeerMap, 0),
Peers: []wgtypes.PeerConfig{},
NodePeers: []wgtypes.PeerConfig{},
HostNetworkInfo: models.HostInfoMap{},
EndpointDetection: servercfg.IsEndpointDetectionEnabled(),
}
slog.Debug("peer update for host", "hostId", host.ID.String())
peerIndexMap := make(map[string]int)
for _, nodeID := range host.Nodes {
nodeID := nodeID
node, err := GetNodeByID(nodeID)
if err != nil {
continue
}
if !node.Connected || node.PendingDelete || node.Action == models.NODE_DELETE {
continue
}
if host.OS == models.OS_Types.IoT {
hostPeerUpdate.NodeAddrs = append(hostPeerUpdate.NodeAddrs, node.PrimaryAddressIPNet())
if node.IsRelayed {
relayNode, err := GetNodeByID(node.RelayedBy)
if err != nil {
continue
}
relayHost, err := GetHost(relayNode.HostID.String())
if err != nil {
continue
}
relayPeer := wgtypes.PeerConfig{
PublicKey: relayHost.PublicKey,
PersistentKeepaliveInterval: &relayHost.PersistentKeepalive,
ReplaceAllowedIPs: true,
AllowedIPs: GetAllowedIPs(&node, &relayNode, nil),
}
uselocal := false
if host.EndpointIP.String() == relayHost.EndpointIP.String() {
// peer is on same network
// set to localaddress
uselocal = true
if node.LocalAddress.IP == nil {
// use public endpint
uselocal = false
}
if node.LocalAddress.String() == relayNode.LocalAddress.String() {
uselocal = false
}
}
relayPeer.Endpoint = &net.UDPAddr{
IP: relayHost.EndpointIP,
Port: GetPeerListenPort(relayHost),
}
if uselocal {
relayPeer.Endpoint.IP = relayNode.LocalAddress.IP
relayPeer.Endpoint.Port = relayHost.ListenPort
}
hostPeerUpdate.Peers = append(hostPeerUpdate.Peers, relayPeer)
} else if deletedNode != nil && deletedNode.IsRelay {
relayHost, err := GetHost(deletedNode.HostID.String())
if err != nil {
continue
}
relayPeer := wgtypes.PeerConfig{
PublicKey: relayHost.PublicKey,
Remove: true,
}
hostPeerUpdate.Peers = append(hostPeerUpdate.Peers, relayPeer)
}
continue
}
hostPeerUpdate = SetDefaultGw(node, hostPeerUpdate)
if !hostPeerUpdate.IsInternetGw {
hostPeerUpdate.IsInternetGw = IsInternetGw(node)
}
currentPeers := GetNetworkNodesMemory(allNodes, node.Network)
for _, peer := range currentPeers {
peer := peer
if peer.ID.String() == node.ID.String() {
logger.Log(2, "peer update, skipping self")
// skip yourself
continue
}
peerHost, err := GetHost(peer.HostID.String())
if err != nil {
logger.Log(1, "no peer host", peer.HostID.String(), err.Error())
continue
}
peerConfig := wgtypes.PeerConfig{
PublicKey: peerHost.PublicKey,
PersistentKeepaliveInterval: &peerHost.PersistentKeepalive,
ReplaceAllowedIPs: true,
}
if peer.IsEgressGateway {
hostPeerUpdate.EgressRoutes = append(hostPeerUpdate.EgressRoutes, models.EgressNetworkRoutes{
NodeAddr: node.Address,
NodeAddr6: node.Address6,
EgressRanges: peer.EgressGatewayRanges,
})
}
if peer.IsIngressGateway {
hostPeerUpdate.EgressRoutes = append(hostPeerUpdate.EgressRoutes, getExtpeersExtraRoutes(peer.Network)...)
}
_, isFailOverPeer := node.FailOverPeers[peer.ID.String()]
if servercfg.IsPro {
if (node.IsRelayed && node.RelayedBy != peer.ID.String()) ||
(peer.IsRelayed && peer.RelayedBy != node.ID.String()) || isFailOverPeer {
// if node is relayed and peer is not the relay, set remove to true
if _, ok := peerIndexMap[peerHost.PublicKey.String()]; ok {
continue
}
peerConfig.Remove = true
hostPeerUpdate.Peers = append(hostPeerUpdate.Peers, peerConfig)
peerIndexMap[peerHost.PublicKey.String()] = len(hostPeerUpdate.Peers) - 1
continue
}
if node.IsRelayed && node.RelayedBy == peer.ID.String() {
hostPeerUpdate = SetDefaultGwForRelayedUpdate(node, peer, hostPeerUpdate)
}
}
uselocal := false
if host.EndpointIP.String() == peerHost.EndpointIP.String() {
// peer is on same network
// set to localaddress
uselocal = true
if node.LocalAddress.IP == nil {
// use public endpint
uselocal = false
}
if node.LocalAddress.String() == peer.LocalAddress.String() {
uselocal = false
}
}
//if host is ipv4 only or ipv4+ipv6, set the peer endpoint to ipv4 address, if host is ipv6 only, set the peer endpoint to ipv6 address
peerEndpoint := peerHost.EndpointIP
if ipv4 := host.EndpointIP.To4(); ipv4 != nil {
peerEndpoint = peerHost.EndpointIP
} else {
//if peer host's ipv6 address is empty, it means that peer is an IPv4 only host
//IPv4 only host could not communicate with IPv6 only host
if peerHost.EndpointIPv6 != nil && peerHost.EndpointIPv6.String() != "" {
peerEndpoint = peerHost.EndpointIPv6
}
}
peerConfig.Endpoint = &net.UDPAddr{
IP: peerEndpoint,
Port: GetPeerListenPort(peerHost),
}
if uselocal {
peerConfig.Endpoint.IP = peer.LocalAddress.IP
peerConfig.Endpoint.Port = peerHost.ListenPort
}
allowedips := GetAllowedIPs(&node, &peer, nil)
if peer.Action != models.NODE_DELETE &&
!peer.PendingDelete &&
peer.Connected &&
nodeacls.AreNodesAllowed(nodeacls.NetworkID(node.Network), nodeacls.NodeID(node.ID.String()), nodeacls.NodeID(peer.ID.String())) &&
(deletedNode == nil || (deletedNode != nil && peer.ID.String() != deletedNode.ID.String())) {
peerConfig.AllowedIPs = allowedips // only append allowed IPs if valid connection
}
var nodePeer wgtypes.PeerConfig
if _, ok := peerIndexMap[peerHost.PublicKey.String()]; !ok {
hostPeerUpdate.Peers = append(hostPeerUpdate.Peers, peerConfig)
peerIndexMap[peerHost.PublicKey.String()] = len(hostPeerUpdate.Peers) - 1
hostPeerUpdate.HostNetworkInfo[peerHost.PublicKey.String()] = models.HostNetworkInfo{
Interfaces: peerHost.Interfaces,
ListenPort: peerHost.ListenPort,
IsStatic: peerHost.IsStatic,
}
nodePeer = peerConfig
} else {
peerAllowedIPs := hostPeerUpdate.Peers[peerIndexMap[peerHost.PublicKey.String()]].AllowedIPs
peerAllowedIPs = append(peerAllowedIPs, peerConfig.AllowedIPs...)
hostPeerUpdate.Peers[peerIndexMap[peerHost.PublicKey.String()]].AllowedIPs = peerAllowedIPs
hostPeerUpdate.Peers[peerIndexMap[peerHost.PublicKey.String()]].Remove = false
hostPeerUpdate.HostNetworkInfo[peerHost.PublicKey.String()] = models.HostNetworkInfo{
Interfaces: peerHost.Interfaces,
ListenPort: peerHost.ListenPort,
IsStatic: peerHost.IsStatic,
}
nodePeer = hostPeerUpdate.Peers[peerIndexMap[peerHost.PublicKey.String()]]
}
if node.Network == network && !peerConfig.Remove && len(peerConfig.AllowedIPs) > 0 { // add to peers map for metrics
hostPeerUpdate.PeerIDs[peerHost.PublicKey.String()] = models.IDandAddr{
ID: peer.ID.String(),
HostID: peerHost.ID.String(),
Address: peer.PrimaryAddress(),
Name: peerHost.Name,
Network: peer.Network,
ListenPort: peerHost.ListenPort,
}
hostPeerUpdate.NodePeers = append(hostPeerUpdate.NodePeers, nodePeer)
}
}
var extPeers []wgtypes.PeerConfig
var extPeerIDAndAddrs []models.IDandAddr
var egressRoutes []models.EgressNetworkRoutes
if node.IsIngressGateway {
extPeers, extPeerIDAndAddrs, egressRoutes, err = getExtPeers(&node, &node)
if err == nil {
hostPeerUpdate.EgressRoutes = append(hostPeerUpdate.EgressRoutes, egressRoutes...)
hostPeerUpdate.Peers = append(hostPeerUpdate.Peers, extPeers...)
for _, extPeerIdAndAddr := range extPeerIDAndAddrs {
extPeerIdAndAddr := extPeerIdAndAddr
if node.Network == network {
hostPeerUpdate.PeerIDs[extPeerIdAndAddr.ID] = extPeerIdAndAddr
hostPeerUpdate.NodePeers = append(hostPeerUpdate.NodePeers, extPeers...)
}
}
} else if !database.IsEmptyRecord(err) {
logger.Log(1, "error retrieving external clients:", err.Error())
}
}
if node.IsEgressGateway && node.EgressGatewayRequest.NatEnabled == "yes" && len(node.EgressGatewayRequest.Ranges) > 0 {
hostPeerUpdate.FwUpdate.IsEgressGw = true
hostPeerUpdate.FwUpdate.EgressInfo[node.ID.String()] = models.EgressInfo{
EgressID: node.ID.String(),
Network: node.PrimaryNetworkRange(),
EgressGwAddr: net.IPNet{
IP: net.ParseIP(node.PrimaryAddress()),
Mask: getCIDRMaskFromAddr(node.PrimaryAddress()),
},
EgressGWCfg: node.EgressGatewayRequest,
}
}
if IsInternetGw(node) {
hostPeerUpdate.FwUpdate.IsEgressGw = true
egressrange := []string{"0.0.0.0/0"}
if node.Address6.IP != nil {
egressrange = append(egressrange, "::/0")
}
hostPeerUpdate.FwUpdate.EgressInfo[fmt.Sprintf("%s-%s", node.ID.String(), "inet")] = models.EgressInfo{
EgressID: fmt.Sprintf("%s-%s", node.ID.String(), "inet"),
Network: node.PrimaryAddressIPNet(),
EgressGwAddr: net.IPNet{
IP: net.ParseIP(node.PrimaryAddress()),
Mask: getCIDRMaskFromAddr(node.PrimaryAddress()),
},
EgressGWCfg: models.EgressGatewayRequest{
NodeID: fmt.Sprintf("%s-%s", node.ID.String(), "inet"),
NetID: node.Network,
NatEnabled: "yes",
Ranges: egressrange,
},
}
}
}
// == post peer calculations ==
// indicate removal if no allowed IPs were calculated
for i := range hostPeerUpdate.Peers {
peer := hostPeerUpdate.Peers[i]
if len(peer.AllowedIPs) == 0 {
peer.Remove = true
}
hostPeerUpdate.Peers[i] = peer
}
if deletedNode != nil && host.OS != models.OS_Types.IoT {
peerHost, err := GetHost(deletedNode.HostID.String())
if err == nil && host.ID != peerHost.ID {
if _, ok := peerIndexMap[peerHost.PublicKey.String()]; !ok {
hostPeerUpdate.Peers = append(hostPeerUpdate.Peers, wgtypes.PeerConfig{
PublicKey: peerHost.PublicKey,
Remove: true,
})
}
}
}
for i := range hostPeerUpdate.NodePeers {
peer := hostPeerUpdate.NodePeers[i]
if len(peer.AllowedIPs) == 0 {
peer.Remove = true
}
hostPeerUpdate.NodePeers[i] = peer
}
if len(deletedClients) > 0 {
for i := range deletedClients {
deletedClient := deletedClients[i]
key, err := wgtypes.ParseKey(deletedClient.PublicKey)
if err == nil {
hostPeerUpdate.Peers = append(hostPeerUpdate.Peers, wgtypes.PeerConfig{
PublicKey: key,
Remove: true,
})
}
}
}
return hostPeerUpdate, nil
}
// GetPeerListenPort - given a host, retrieve it's appropriate listening port
func GetPeerListenPort(host *models.Host) int {
peerPort := host.ListenPort
if host.WgPublicListenPort != 0 {
peerPort = host.WgPublicListenPort
}
return peerPort
}
// GetAllowedIPs - calculates the wireguard allowedip field for a peer of a node based on the peer and node settings
func GetAllowedIPs(node, peer *models.Node, metrics *models.Metrics) []net.IPNet {
var allowedips []net.IPNet
allowedips = getNodeAllowedIPs(peer, node)
if peer.IsInternetGateway && node.InternetGwID == peer.ID.String() {
allowedips = append(allowedips, GetAllowedIpForInetNodeClient(node, peer)...)
return allowedips
}
if node.IsRelayed && node.RelayedBy == peer.ID.String() {
allowedips = append(allowedips, GetAllowedIpsForRelayed(node, peer)...)
if peer.InternetGwID != "" {
return allowedips
}
}
// handle ingress gateway peers
if peer.IsIngressGateway {
extPeers, _, _, err := getExtPeers(peer, node)
if err != nil {
logger.Log(2, "could not retrieve ext peers for ", peer.ID.String(), err.Error())
}
for _, extPeer := range extPeers {
allowedips = append(allowedips, extPeer.AllowedIPs...)
}
}
return allowedips
}
func GetEgressIPs(peer *models.Node) []net.IPNet {
peerHost, err := GetHost(peer.HostID.String())
if err != nil {
logger.Log(0, "error retrieving host for peer", peer.ID.String(), err.Error())
}
// check for internet gateway
internetGateway := false
if slices.Contains(peer.EgressGatewayRanges, "0.0.0.0/0") || slices.Contains(peer.EgressGatewayRanges, "::/0") {
internetGateway = true
}
allowedips := []net.IPNet{}
for _, iprange := range peer.EgressGatewayRanges { // go through each cidr for egress gateway
_, ipnet, err := net.ParseCIDR(iprange) // confirming it's valid cidr
if err != nil {
logger.Log(1, "could not parse gateway IP range. Not adding ", iprange)
continue // if can't parse CIDR
}
// getting the public ip of node
if ipnet.Contains(peerHost.EndpointIP) && !internetGateway { // ensuring egress gateway range does not contain endpoint of node
logger.Log(2, "egress IP range of ", iprange, " overlaps with ", peerHost.EndpointIP.String(), ", omitting")
continue // skip adding egress range if overlaps with node's ip
}
// TODO: Could put in a lot of great logic to avoid conflicts / bad routes
if ipnet.Contains(peer.LocalAddress.IP) && !internetGateway { // ensuring egress gateway range does not contain public ip of node
logger.Log(2, "egress IP range of ", iprange, " overlaps with ", peer.LocalAddress.String(), ", omitting")
continue // skip adding egress range if overlaps with node's local ip
}
if err != nil {
logger.Log(1, "error encountered when setting egress range", err.Error())
} else {
allowedips = append(allowedips, *ipnet)
}
}
return allowedips
}
func getNodeAllowedIPs(peer, node *models.Node) []net.IPNet {
var allowedips = []net.IPNet{}
if peer.Address.IP != nil {
allowed := net.IPNet{
IP: peer.Address.IP,
Mask: net.CIDRMask(32, 32),
}
allowedips = append(allowedips, allowed)
}
if peer.Address6.IP != nil {
allowed := net.IPNet{
IP: peer.Address6.IP,
Mask: net.CIDRMask(128, 128),
}
allowedips = append(allowedips, allowed)
}
// handle egress gateway peers
if peer.IsEgressGateway {
// hasGateway = true
egressIPs := GetEgressIPs(peer)
allowedips = append(allowedips, egressIPs...)
}
if peer.IsRelay {
allowedips = append(allowedips, RelayedAllowedIPs(peer, node)...)
}
if peer.IsFailOver {
allowedips = append(allowedips, GetFailOverPeerIps(peer, node)...)
}
return allowedips
}
func getCIDRMaskFromAddr(addr string) net.IPMask {
cidr := net.CIDRMask(32, 32)
ipAddr, err := netip.ParseAddr(addr)
if err != nil {
return cidr
}
if ipAddr.Is6() {
cidr = net.CIDRMask(128, 128)
}
return cidr
}